Compton effect
The incoming photons' energy must be in the range of an X-ray frequency to generate the Compton effect. The electron does not lose enough energy that reduces the wavelength of scattered photons towards the visible spectrum. As a result, with visible lights, the Compton effect is missing.
Recoil Velocity
The amount of backward thrust or force experienced by a person when he/she shoots a gun in the forward direction is called recoil velocity. This phenomenon always follows the law of conservation of linear momentum.
A photon having wavelength l scatters off a free electron at A (as shown), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having wavelength λ''
and moving in a direction directly opposite the original photon as shown in the figure. Determine the value of Δλ = λ'' -λ.
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