A light source of wavelength λ illuminates a metal and ejects photo electrons with a maximum kinetic energy of 1.2 eV. A second light source with half the wavelength of the first ejects photoelectrons with a maximum kinetic energy of 3.9 eV. What is the work function of the metal? Answer in units of eV.
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 light source of wavelength λ illuminates a metal and ejects photo electrons with a maximum kinetic energy of 1.2 eV. A second light source with half the wavelength of the first ejects photoelectrons with a maximum kinetic energy of 3.9 eV. What is the work function of the metal? Answer in units of eV.
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