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HhaA monochromatic source of light is placed at a large distance d from a metal surface Photoelectrons are ejected at rate n,kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly???

HhaA monochromatic source of light is placed at a large distance d from a metal surface Photoelectrons are ejected at rate n,kinetic energy being E. If the source is brought nearer to distance d/2, the rate and kinetic energy per photoelectron become nearly???
 

Grade:11

1 Answers

Eshan
askIITians Faculty 2095 Points
3 years ago
Dear student,

When source is placed at half the distance, the intensity of the light becomes 4 times and so does the number of photons hitting the metal per second, and so does the number of photoelectrons ejected. However since the energy of each photon still remains the same(h\nu, the kinetic energy of photoelectrons also remains the same in accordance with the photoelectric equation.

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