An experiment is performed where light of different frequencies is shined on an iron plate. The work function for iron is 4.50 eV. (a) What is the lowest frequency (the "cutoff" frequency, in Hz) of light incident on iron, below which no photoelectrons will be emitted from its surface?  Hz (b) What is the longest wavelength (the "cutoff" wavelength, in nm) of light incident on iron, above which no photoelectrons will be emitted from its surface?  nm (c) Photons of energy 5.73 eV are incident on the iron plate. What is the maximum kinetic energy (in eV) of the ejected photoelectrons?  eV

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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.