In the Compton effect, an X-ray photon of wavelength 0.23 nm is incident on a st
ID: 1770951 • Letter: I
Question
In the Compton effect, an X-ray photon of wavelength 0.23 nm is incident on a stationary electron. Upon collision with the electron, the scattered X-ray photon continues to travel in the same direction as the incident photon. What is the wavelength ' of the scattered photon? ' = Number Units?
Now An AM radio station broadcasts an electromagnetic wave with a frequency of 872 kHz, whereas an FM station broadcasts an electromagnetic wave with a frequency of 96.5 MHz. How many AM photons are needed to have a total energy equal to that of one FM photon? Number Units
Explanation / Answer
a). If the photon is not scattered at all there is no change in energy of the photon and thus no change in wavelength. Or to put it another way photons always travel at the same speed and if their direction does not change their momentum does not change.
If their momentum doesn't change their energy doesn't change because E = pc. Same energy, same wavelength.