A photon of wavelength 192 nm strikes an aluminium surface along a line perpendicular to the surface and releases a photoelectron travelling in the opposite direction. Assume the recoil momentum is taken up by a single aluminium atom on the surface. Calculate the recoil kinetic energy of the atom. Would this recoil energy significantly affect the kinetic energy of the photoelectron? (The atomic mass of aluminium is 26.98 u).
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 of wavelength 192 nm strikes an aluminium surface along a line
perpendicular to the surface and releases a photoelectron travelling in the opposite
direction. Assume the recoil momentum is taken up by a single aluminium atom on
the surface. Calculate the recoil kinetic energy of the atom. Would this recoil energy
significantly affect the kinetic energy of the photoelectron? (The
aluminium is 26.98 u).
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