Barium has a work function of 2.48 eV. (A) Cut-off frequency = Unit Hz Light of wavelength 404 nm shine on this metal. (B) Energy of the photon : Unit eV (C) KE energy of the ejected electrons = Unit 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.