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Author Question: Which of the following are assumed when analyzing photons involved in Compton scattering? A. ... (Read 76 times)

azncindy619

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on: Jul 28, 2018
Which of the following are assumed when analyzing photons involved in Compton scattering?
  A. Momentum, but not energy, is conserved when the photon scatters from an electron.
  B. The photon always recoils with significant energy lost to the electron.
  C. The photon behaves like a wave and diffracts at an angle from the electron.
  D. Scattering from tightly bound electrons always produces the photons with greatest wavelength change.
  E. Energy and momentum are treated relativistically in the scattering.

Question 2

Which of the following statements about blackbody radiation is NOT correct?
 
A. The wavelength of peak relative intensity emitted from a blackbody depends on 1/T, the temperature of the blackbody.
  B. The power per unit area given by blackbody radiation depends on T4.
  C. The classical theory of intensity vs. wavelength, the Rayleigh-Jeans formula, of blackbody radiation is only correct at large wavelengths.
  D. Planck's radiation law for intensity vs. wavelength of blackbody radiation depends on and T4.


Question 3

Which of the following statements is correct about the experiment that first measured the charge of the electron?
 
A. The oil drop is suspended because there are no forces acting on the drop
  B. The important result was that Coulomb attraction made all of the oil drops the same mass, regardless of type of oil
  C. The mass of the drop was determined by measuring its terminal velocity
  D. The value for electron charge had an experimental error of about 35
  E. Light hitting the oil drops manipulated their movement in a way to create an interference pattern.


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jojobee318

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Reply #1 on: Jul 28, 2018
Answer to Question 1

E.
Energy and momentum are treated relativistically in the scattering.

Answer to Question 2

D.
Planck's radiation law depends on (but even that is incomplete) but does not depend on T4.

Answer to Question 3

C.
The terminal velocity of the drop occurs when the frictional drag forcewhich depends on velocitybalances exactly the gravitational force and the drop falls at constant velocity. The radius of the drop is related to the terminal velocity, and knowing the density of the oil can give the mass.


azncindy619

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Reply 2 on: Jul 28, 2018
Gracias!

smrtceo

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Reply 3 on: Yesterday
:D TYSM

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