Photons of wavelength scatter elastically from protons at rest. ...

[Bernana]

Photons of wavelength  scatter elastically from protons at rest. The wavelength of photons scattered at 90 is increased by:
  1./137
  2.h/2c
  3.h/(mec)
  4.h/(mpc)
  5. cos(45)
  6.None of the above

Question 2

An interpretation of the photoelectric effect is that:
  1.Light is emitted only when electrons change orbits.
  2.Light has a wavelike character.
  3.Light is absorbed in quanta of energy E = h
  4.Electrons have an associated wave having wavelength  = h/p.
  5.Photons must have some minimum energy to penetrate a material.
  6.More than one of the above

[b614102004]

Answer to Question 1

4

Answer to Question 2

3

[Bernana]

TYSM

[parker125]

Excellent