Question Detail

PHY 104 Photo Electric Emission Objective Question

Question

Why does the document state that the actual predictions of how light scatters from charged particles in Compton Scattering 'does not fit our simple wave model'?
Options
A The wave model predicts a change in wavelength, which is not observed.
B The wave model predicts a constant wavelength, whereas a change is observed, requiring a photon (particle) model.
Correct Answer
C The wave model cannot account for the interaction between light and charged particles at all.
D The wave model overestimates the energy transfer during scattering.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 8 states, 'But the actual predictions of how the light scatters from the charged particles does not fit our simple wave model.' Then it immediately suggests, 'If we consider the photon idea of light, some of the photons would “hit” the charged particles and 'bounce off'… The laws of conservation of energy and momentum should then predict the scattering.' This implies the wave model cannot explain the observed change in wavelength/energy, necessitating a particle model for light.

Hint

Consider what happens when light scatters according to the wave theory versus what is actually observed in Compton scattering, as explained on page 8.

Question Info