Chapter 27 questions

Question 1

True or false? When a photon scatters off an electron, the photon loses energy.

Answer 1

true

Question 2

An xray photon is scattered by an electron. Which of the following happens to the frequency of the scattered photon relative to the incident photon

Answer 2

it decreases

Question 3

A photon of energy Eo strikes a free electron, with the scattered photon of energy E moving in the direction opposite that of the incident photon. In this compton effect interaction, what is the resulting kinetic energy of the electron?

Answer 3

Eo-E

Question 4

True or false, as the momentum of a particle of mass m increases, its wavelength increases

Answer 4

false

Question 5

A nonrelativistic electron and a nonrelativistic proton are moving and have the same de broglie wavelength. which of the following is also true for the two particles?

Answer 5

momentum

Question 6

For a blackbody at a given temperature lambdamax is the wavelength at the peak of the radiation distribution. What happens to lambdamax as the temperature increases

Answer 6

it decreases (lamdamaxT=0.298E-2)

Question 7

A proton, an ant, and a baseball all have the same kinetic energy. Rank their de broglie wavelengths from smallest to largest.

Answer 7

baseball, ant, proton

Question 8

The cutoff frequency of a material is fo. When are electrons emitted from the material?

Answer 8

When light of frequency greater than fo is incident on the material

Question 9

If matter has a wave nature, why is this wave like characteristic not observable in our daily experiences

Answer 9

any object of macroscopic size, including a grain of dust, has an undetectably small wavelength, so any diffraction effects it might exhibit are very small, effectively undetectable. Recall historically how the diffraction of sound waves was at one time well known, but diffraction of light was not