This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A ruby laser beam (l = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, ... (Read 94 times)

D2AR0N

  • Hero Member
  • *****
  • Posts: 561
on: Jul 28, 2018
A ruby laser beam (l = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
 a. 500 m
  b. 250 m
  c. 120 m
  d. 1.0 km
  e. 2.7 km

Question 2

Plane waves of ultrasound, f = 51.0 kHz, impinge on a flat plane with a 1.00 cm-wide slit. What is the total angular width (2q) of diffracted sound waves when the speed of sound in air is 340 m/sec.
 a. 167
  b. 83.6
  c. 19.5
  d. 41.8
  e. 0.11


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

wuly

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


D2AR0N

  • Member
  • Posts: 561
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

kswal303

  • Member
  • Posts: 316
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T
Taken by Hinode's Solar Optical Telescope on January 12, 2007, this image of the Sun reveals th Taken by Hinode's Solar Optical Telescope on January 12, 2007, this image of the Sun reveals th
Moon Moon
Einstein telescope Einstein telescope
Newton Telescope Newton Telescope
Telescope Telescope
Video: Bipolar Disorder

For a complete list of videos, visit our video library