Author Question: Find the energy of a photon whose frequency is 5 1012 Hz. ... (Read 72 times)

Tazate · **on:** Jul 29, 2018

Find the energy of a photon whose frequency is 5 1012 Hz.

Question 2

Ionization is a process whereby an atom acquires enough energy so that one or more of its electrons __________ from the nucleus.
Fill in the blank(s) with correct word

Question 3

An electron absorbing an ultraviolet photon will be ejected with a _________ energy than an electron absorbing a violet photon.
Fill in the blank(s) with correct word

Question 4

The energy of a photon is _________ proportional to its frequency and __________proportio nal to its wavelength.
Fill in the blank(s) with correct word

Question 5

A hot luminous solid emits a ______________ spectrum, while a hot luminous gas produces a ______ spectrum.
Fill in the blank(s) with correct word

Question 6

An atom is said to have been ________ when it absorbs a photon with sufficient energy to free an electron.
Fill in the blank(s) with correct word

Question 7

In the Bohr model of the atom, a photon may be _________ when an electron jumps from a large, high energy orbit to a smaller, low energy orbit.
Fill in the blank(s) with correct word

Question 8

Four different uses of lasers are __________, __________, __________, and __________,
Fill in the blank(s) with correct word

Question 9

In a laser the emitted light is __________.
Fill in the blank(s) with correct word

Question 10

Two devices that make use of the wavelike nature of electrons are the ______________ and the __________.
Fill in the blank(s) with correct word

Question 11

__________ in an x-ray spectrum of an atom occurs because of rapid deceleration of the bombarding electrons.
Fill in the blank(s) with correct word

Question 12

__________ in an x-ray spectrum of an atom occur because electrons in the atom make transitions to lower energy levels after being bombarded with high energy electrons.
Fill in the blank(s) with correct word

Question 13

When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________.
Fill in the blank(s) with correct word

Question 14

When the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons __________.
Fill in the blank(s) with correct word

Question 15

The person who developed the exclusion principle was __________.
Fill in the blank(s) with correct word

Question 16

The person who developed the concept of a wave function was __________.
Fill in the blank(s) with correct word

Question 17

The principal founders of the mathematical model of quantum mechanics were __________ and __________.
Fill in the blank(s) with correct word

Question 18

The person who expounded the uncertainty principle was __________.
Fill in the blank(s) with correct word

Question 19

The person who first explained the discrete hydrogen atom spectrum was __________.
Fill in the blank(s) with correct word

Question 20

The person who first explained the photoelectric effect was __________.
Fill in the blank(s) with correct word

Question 21

When something is restricted to having only certain numerical values, it is said to be ________________.
Fill in the blank(s) with correct word

Question 22

The person who first explained the blackbody spectrum was __________.
Fill in the blank(s) with correct word

Question 23

The peak of the radiation curve of a blackbody moves toward larger wavelength as its temperature __________.
Fill in the blank(s) with correct word

Question 24

The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature __________.
Fill in the blank(s) with correct word

Question 25

In a blackbody, the __________ of the oscillating atoms is quantized.
Fill in the blank(s) with correct word

Question 26

A __________ is a three-dimensional image made using a laser.
Fill in the blank(s) with correct word

Question 27

In an energy level transition from the n = 2 state to the n = 1 state for a hydrogen atom a photon will be ___________.
Fill in the blank(s) with correct word

Question 28

The highest energy level in an atom corresponds to n = _________.
Fill in the blank(s) with correct word

Question 29

The lowest energy level in an atom is its __________.
Fill in the blank(s) with correct word

Question 30

The __________ states that a particle cannot be precisely localized.
Fill in the blank(s) with correct word

Question 31

Two things that are quantized in the Bohr model of the hydrogen atom are __________ and __________.
Fill in the blank(s) with correct word

Question 32

An atom can be excited into a higher energy state by absorbing a __________.
Fill in the blank(s) with correct word

Question 33

An excited atom can lose energy by emitting a __________.
Fill in the blank(s) with correct word

Question 34

A quantum of electromagnetic radiation is a __________.
Fill in the blank(s) with correct word

Question 35

The __________ occurs when electrons are emitted when light strikes the surface of a metal.
Fill in the blank(s) with correct word

Question 36

Laser light is ________ and monochromatic, and usually of much ________ intensity than the light from the light bulb.
a. coherent b. incoherent
c. lower d. higher

Question 37

Electrons in atoms
a. orbit the nucleus in well-defined circular orbits.
b. radiate electromagnetic energy continuously.
c. act as if spread out in a cloud around the nucleus.
d. behave as predicted by quantum mechanics.

Question 38

The mathematical model of quantum mechanics was principally founded by
a. Max Planck.
b. Albert Einstein.
c. Neils Bohr.
d. Erwin Schrdinger.
e. Werner Heisenberg.

Question 39

As the temperature of a blackbody increases, the peak of its radiation curve moves
a. upward toward higher intensity.
b. downward toward lower intensity.
c. toward larger wavelength.
d. toward smaller wavelength.
e. none of the above.

Question 40

Which of the following devices use lasers?
a. DVD players
b. fiber optics communication systems
c. photocopiers
d. UPC price scanners

Question 41

In which of the following energy level transitions for a hydrogen atom is a photon emitted?
a. n = 1 to n = 2
b. n = 3 to n = 2
c. n = 2 to n = 1
d. n = 1 to n = 4
e. n = 4 to n = 3

Question 42

According to the Pauli Exclusion Principle for n = 4, the occupation limit of electrons is
a. 4 b. 8
c. 16 d. 32

Question 43

The red line in the helium spectrum is closer to orange than the red line in the hydrogen spectrum, indicating that it has a higher frequency. Therefore, the photons of red light emitted by helium have __________ energy than those emitted by hydrogen.
a. lower b. higher
c. the same d. more ionization

Question 44

A population inversion is a circumstance within a laser system in which there are ______ atoms with their electrons in an upper excited state than in a specific preferred lower state.
a. more b. fewer
c. the same amount d. ionized

Question 45

The Balmer series of emission lines from hydrogen lie in the ________ part of the EM spectrum.
a. near infrared b. infrared
c. visible d. ultraviolet

Question 46

The energy of a photon that ionizes a hydrogen atom from the ground state will be _________ the energy of a photon that ionizes a different hydrogen atom from the first excited state (n 2).
a. larger than b. smaller than
c. equal to d. twice

Question 47

How small an object can a scanning tunneling microscope see?
a. about the size of a mushroom spore
b. about the size of a living cell
c. as small as a single atom
d. as small as the nucleus of an atom

Question 48

The aurora borealis (northern lights) are caused by
a. sunlight reflecting from polar ice.
b. emissions from atoms and molecules in the upper atmosphere excited by electrons from the Sun.
c. thunderstorms.
d. an unknown process.

Question 49

Lasers are used
a. to produce holograms.
b. in surgery.
c. to measure distances between objects accurately.
d. in DVD and compact disc players.
e. all of the above

Question 50

In a laser
a. light is amplified by stimulated emission of radiation.
b. the emitted light is monochromatic.
c. the emitted light is coherent.
d. there is a population inversion of electrons in atoms.
e. all of the above

Question 51

The continuous part of an x-ray spectrum of an atom occurs because
a. of photon absorption.
b. of the photoelectric effect.
c. electrons in the atom make transitions to lower energy levels.
d. of the uncertainty principle.
e. of rapid deceleration of the bombarding electrons.

Question 52

The characteristic peaks in an x-ray spectrum of an atom occur because
a. of photon absorption.
b. of the photoelectric effect.
c. electrons in the atom make transitions to lower energy levels.
d. of the uncertainty principle.
e. of rapid deceleration of the bombarding electrons.

Question 53

When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons
a. increases.
b. decreases.
c. stays the same.
d. becomes more quantized.
e. becomes less quantized.

Question 54

When the intensity of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons
a. increases.
b. decreases.
c. stays the same.
d. becomes more quantized.
e. becomes less quantized.

Question 55

The person who developed the concept of a wave function was
a. Max Planck.
b. Albert Einstein.
c. Neils Bohr.
d. Erwin Schrdinger.
e. Werner Heisenberg.

Question 56

The person who expounded the uncertainty principle was
a. Max Planck.
b. Albert Einstein.
c. Neils Bohr.
d. Erwin Schrdinger.
e. Werner Heisenberg.

Question 57

The spectra of different elements can be distinguished because
a. they have the same spectral lines, but the lines are of different intensities.
b. they have spectral lines in different positions.
c. every element has one unique spectral line.
d. none of the above

Question 58

What is meant by a line spectrum?
a. a spectrum which is straight
b. a spectrum made of bright lines in certain places, separated by dark gaps
c. a spectrum made by a hot filament stretched into a straight line
d. none of the above

Question 59

The person who first explained the discrete hydrogen atom spectrum was
a. Max Planck.
b. Albert Einstein.
c. Neils Bohr.
d. Erwin Schrdinger.
e. Werner Heisenberg.

Question 60

Which of the following devices make use of the photoelectric effect?
a. digital cameras
b. photocopiers
c. laser printers
d. solar cells
e. all of the above

Question 61

The person who first explained the photoelectric effect was
a. Max Planck.
b. Albert Einstein.
c. Neils Bohr.
d. Erwin Schrdinger.
e. Werner Heisenberg.

Question 62

What quantities are plotted on a blackbody radiation curve?
a. total radiated energy vs. temperature
b. radiation intensity vs. wavelength
c. wavelength of peak emission vs. temperature
d. none of the above

Question 63

The person who first explained the blackbody spectrum was
a. Max Planck.
b. Albert Einstein.
c. Neils Bohr.
d. Erwin Schrdinger.
e. Werner Heisenberg.

Question 64

The quantity that is quantized in the oscillating atoms of a blackbody is
a. angular momentum.
b. energy.
c. the emission spectrum.
d. the absorption spectrum.
e. the wave function.

Question 65

What is coherent light?
a. light of a single wavelength
b. light that is all in phase
c. light that is polarized in one direction
d. none of the above

Question 66

Which of these is not involved in the operation of lasers?
a. stimulated emission b. population inversion
c. metastable state d. blackbody radiation

Question 67

A three-dimensional image made using a laser is a(n)
a. emission spectrum.
b. absorption spectrum.
c. wave function.
d. hologram.
e. photoelectric effect.

Question 68

Electron diffraction shows
a. that electrons behave like waves.
b. the photoelectric effect.
c. characteristic x-ray spectra.
d. that electrons in atoms have only certain allowed energies.

Question 69

If the speed of an electron increases, its de Broglie wavelength
a. increases. b. decreases.
c. stays the same. d. may increase or decrease.

Question 70

The highest energy level in an atom is its
a. ionization level.
b. emission level.
c. absorption level.
d. photon level.
e. ground state.

Question 71

The lowest energy level in an atom is its
a. ionization level.
b. emission level.
c. absorption level.
d. photon level.
e. ground state.

Question 72

What is excluded by the Pauli exclusion principle?
a. certain values of angular momentum
b. precise values of both position and momentum
c. electrons in the same quantum state
d. none of the above

Question 73

The fact that a particle cannot be precisely localized is the
a. photoelectric effect.
b. uncertainty principle.
c. principle of a hologram.
d. principle of a laser.
e. reason why photons are emitted.

Question 74

In the Bohr model of the hydrogen atom
a. energy is quantized.
b. the electron's angular momentum is quantized.
c. the emission spectrum is quantized.
d. the absorption spectrum is quantized.
e. all of the above

Question 75

An atom can be excited into a higher energy state by
a. emitting a photon.
b. absorbing a photon.
c. undergoing the photoelectric effect.
d. decreasing its de Broglie wavelength.
e. the uncertainty principle.

Question 76

An excited atom can lose energy by
a. emitting a photon.
b. absorbing a photon.
c. undergoing the photoelectric effect.
d. increasing its de Broglie wavelength.
e. the uncertainty principle.

Question 77

The energy associated with a photon of blue light is ________________ the energy associated with a photon of red light.
a. greater than b. less than
c. equal to d. unrelated to

Question 78

What does it mean for something to be quantized?
a. It can have only certain discrete values.
b. It can have only integer values.
c. It can have values only between certain limits.
d. none of the above

Question 79

A quantum of electromagnetic radiation is a
a. wave function.
b. photon.
c. de Broglie wave.
d. laser.
e. hologram.

Question 80

Electrons emitted when light strikes the surface of a metal is
a. photon emission.
b. photon absorption.
c. the photoelectric effect.
d. a laser.
e. an emission spectrum.

Question 81

When the speed of an electron is increased the de Broglie wavelength is decreased.
a. True
b. False
Indicate whether the statement is true or false

Question 82

The fact that two electrons cannot occupy the same quantum state at the same time is the Heisenberg exclusion principle.
a. True
b. False
Indicate whether the statement is true or false

Question 83

The aurora borealis is an example of atoms and molecules in the atmosphere absorbing photons and exciting the atoms and molecules to emit spectra.
a. True
b. False
Indicate whether the statement is true or false

Question 84

If an electron acquires more than the ionization energy, the electron will return to the ground state.
a. True
b. False
Indicate whether the statement is true or false

Question 85

UPC price scanners at supermarket checkouts use laser holography to read the bar codes because the packages are three dimensional.
a. True
b. False
Indicate whether the statement is true or false

Question 86

A laser can be used for very accurate measurements of distances between objects.
a. True
b. False
Indicate whether the statement is true or false

Question 87

Light being amplified by stimulated emission of radiation is the principle of the photoelectric effect.
a. True
b. False
Indicate whether the statement is true or false

Question 88

A laser emits monochromatic and coherent light.
a. True
b. False
Indicate whether the statement is true or false

Question 89

At any instant in time, it is possible to specify simultaneously the position and the momentum of a particle to arbitrarily high precision.
a. True
b. False
Indicate whether the statement is true or false

Question 90

The chemical composition of stars can be determined from lines in their spectra.
a. True
b. False
Indicate whether the statement is true or false

Question 91

The characteristic peaks in an x-ray spectrum of an atom occur because of rapid deceleration of the bombarding electrons.
a. True
b. False
Indicate whether the statement is true or false

Question 92

Characteristic peaks occur in an x-ray spectrum of an atom because electrons in the atom make transitions to lower energy levels after being bombarded with high energy electrons.
a. True
b. False
Indicate whether the statement is true or false

Question 93

Photocopiers make use of the photoelectric effect.
a. True
b. False
Indicate whether the statement is true or false

Question 94

When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases.
a. True
b. False
Indicate whether the statement is true or false

Question 95

As the intensity of light is increased in a photoelectric effect experiment, the energy of the emitted electrons increases.
a. True
b. False
Indicate whether the statement is true or false

Question 96

Two different gases may have the same emission line spectrum.
a. True
b. False
Indicate whether the statement is true or false

Question 97

There is a direct correlation between the absorption and emission spectra of a particular gas.
a. True
b. False
Indicate whether the statement is true or false

Question 98

Perfect absorbers of electromagnetic radiation are also perfect emitters.
a. True
b. False
Indicate whether the statement is true or false

Question 99

The energy of an oscillating atom in a blackbody can be any value within a certain limited range.
a. True
b. False
Indicate whether the statement is true or false

Question 100

The peak of the radiation curve of a blackbody moves toward larger wavelength as its temperature increases.
a. True
b. False
Indicate whether the statement is true or false

Question 101

The peak of the radiation curve of a blackbody moves upward toward higher intensity as its temperature increases.
a. True
b. False
Indicate whether the statement is true or false

Question 102

In a blackbody, the energy of the oscillating atoms is quantized.
a. True
b. False
Indicate whether the statement is true or false

Question 103

A 100 eV electron and a 100 eV proton have equal de Broglie wavelengths.
a. True
b. False
Indicate whether the statement is true or false

Question 104

An x-ray can be emitted when an electron undergoes an energy level transition.
a. True
b. False
Indicate whether the statement is true or false

Question 105

The highest energy level in an atom corresponds to n = 1.
a. True
b. False
Indicate whether the statement is true or false

Question 106

The ground state is the lowest energy level in an atom.
a. True
b. False
Indicate whether the statement is true or false

Question 107

The element helium was discovered by studying the Sun's spectrum.
a. True
b. False
Indicate whether the statement is true or false

Question 108

The early Solvay Conferences had a great effect upon the development of quantum mechanics.
a. True
b. False
Indicate whether the statement is true or false

Question 109

Electrons in atoms move about the nucleus in well-defined circular orbits.
a. True
b. False
Indicate whether the statement is true or false

Question 110

The uncertainty principle states that a particle cannot be precisely localized.
a. True
b. False
Indicate whether the statement is true or false

Question 111

In the Bohr model of the hydrogen atom both the energy and orbital angular momentum of the electron are quantized.
a. True
b. False
Indicate whether the statement is true or false

Question 112

In an energy level transition from the n = 2 state to the n =1 state for a hydrogen atom a photon will be emitted.
a. True
b. False
Indicate whether the statement is true or false

Question 113

An atom can be excited into a higher energy state by absorbing a photon.
a. True
b. False
Indicate whether the statement is true or false

Question 114

An excited atom can lose energy by emitting an electron.
a. True
b. False
Indicate whether the statement is true or false

Question 115

A photon is quantum of electromagnetic radiation.
a. True
b. False
Indicate whether the statement is true or false

Question 116

The photoelectric effect occurs when electrons are emitted when light strikes the surface of a metal.
a. True
b. False
Indicate whether the statement is true or false

Question 117

When an object is viewed through a magnifying glass, an object 20 cm high appears as an upright image 100 cm high. What is the magnification?

tsternbergh47 · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

3.32 1021 J

Answer to Question 2

breaks free

Answer to Question 3

higher

Answer to Question 4

directly, inversely

Answer to Question 5

continuous, line

Answer to Question 6

ionized

Answer to Question 7

emitted

Answer to Question 8

to produce holograms, for surgery, to measure accurately distances between objects, in DVD and compact disc players, to cut metals, to induce nuclear fusion reactions, to transmit telephone information along optical fibers, in checkout counter price scanners.

Answer to Question 9

monochromatic, coherent

Answer to Question 10

electron microscope, scanning tunneling microscope (STM)

Answer to Question 11

A continuous variation

Answer to Question 12

Characteristic peaks

Answer to Question 13

increases

Answer to Question 14

stays the same

Answer to Question 15

Wolfgang Pauli

Answer to Question 16

Erwin Schrdinger

Answer to Question 17

Erwin Schrdinger, Werner Heisenberg

Answer to Question 18

Werner Heisenberg

Answer to Question 19

Neils Bohr

Answer to Question 20

Albert Einstein

Answer to Question 21

quantized

Answer to Question 22

Max Planck

Answer to Question 23

decreases

Answer to Question 24

increases

Answer to Question 25

energy

Answer to Question 26

hologram

Answer to Question 27

emitted

Answer to Question 28

infinity

Answer to Question 29

ground state

Answer to Question 30

uncertainty principle

Answer to Question 31

energy, angular momentum, and the spectrum

Answer to Question 32

photon

Answer to Question 33

photon

Answer to Question 34

photon

Answer to Question 35

photoelectric effect

Answer to Question 36

a, d

Answer to Question 37

c, d

Answer to Question 38

d, e

Answer to Question 39

a, d

Answer to Question 40

a, b, d

Answer to Question 41

b, c, e

Answer to Question 42

d

Answer to Question 43

b

Answer to Question 44

a

Answer to Question 45

c

Answer to Question 46

a

Answer to Question 47

c

Answer to Question 48

b

Answer to Question 49

e

Answer to Question 50

e

Answer to Question 51

e

Answer to Question 52

c

Answer to Question 53

a

Answer to Question 54

c

Answer to Question 55

d

Answer to Question 56

e

Answer to Question 57

b

Answer to Question 58

b

Answer to Question 59

c

Answer to Question 60

e

Answer to Question 61

b

Answer to Question 62

b

Answer to Question 63

a

Answer to Question 64

b

Answer to Question 65

b

Answer to Question 66

d

Answer to Question 67

d

Answer to Question 68

a

Answer to Question 69

b

Answer to Question 70

a

Answer to Question 71

e

Answer to Question 72

c

Answer to Question 73

b

Answer to Question 74

e

Answer to Question 75

b

Answer to Question 76

a

Answer to Question 77

a

Answer to Question 78

a

Answer to Question 79

b

Answer to Question 80

c

Answer to Question 81

TRUE

Answer to Question 82

FALSE

Answer to Question 83

TRUE

Answer to Question 84

FALSE

Answer to Question 85

FALSE

Answer to Question 86

TRUE

Answer to Question 87

FALSE

Answer to Question 88

TRUE

Answer to Question 89

FALSE

Answer to Question 90

TRUE

Answer to Question 91

FALSE

Answer to Question 92

TRUE

Answer to Question 93

TRUE

Answer to Question 94

TRUE

Answer to Question 95

FALSE

Answer to Question 96

FALSE

Answer to Question 97

TRUE

Answer to Question 98

TRUE

Answer to Question 99

FALSE

Answer to Question 100

FALSE

Answer to Question 101

TRUE

Answer to Question 102

TRUE

Answer to Question 103

FALSE

Answer to Question 104

TRUE

Answer to Question 105

FALSE

Answer to Question 106

TRUE

Answer to Question 107

TRUE

Answer to Question 108

TRUE

Answer to Question 109

False
RATIONALE: The old Bohr model is not correct.

Answer to Question 110

TRUE

Answer to Question 111

TRUE

Answer to Question 112

TRUE

Answer to Question 113

TRUE

Answer to Question 114

FALSE

Answer to Question 115

TRUE

Answer to Question 116

TRUE

Answer to Question 117

5