Far ultraviolet light with a wavelength of 154 nm is incident on an unknown solid surface, which releases photoelectrons with a maximum speed of 8.10 ✕ 105 m/s. (a) What is the work function of the unknown solid?  eV (b) What is the minimum frequency of incident light for which photoelectrons will be released from this surface?  Hz

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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.