SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The threshold frequency is greater than the photon frequency
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The work function is less than the photon energy
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The intensity of light is high enough
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The wavelength of photon is maximum
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Detailed explanation-1: -If the energy of a photon exceeds the work function of a metal, the photon is capable of ejecting an electron from the material. The energy of the electron is equal to that of the photon minus the work function.
Detailed explanation-2: -When light shines on a metal, electrons can be ejected from the surface of the metal in a phenomenon known as the photoelectric effect. This process is also often referred to as photoemission, and the electrons that are ejected from the metal are called photoelectrons.
Detailed explanation-3: -The energy of the incident photon is given as: It can be observed that the energy of the incident radiation is less than the work function of the metal. Hence, no photoelectric emission will take place.