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Photoelectric emission takes place...

Photoelectric emission takes place

A

when incident wavelength is greater than threshold wavelength

B

when incident wavelength is less than threshold wavelength

C

when incident frequency is greater than threshold frequency

D

at any frequency

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The correct Answer is:
C
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(i) Show that a free electron at rest cannot absorb a photon and thereby acquire kinetic energy equal to the energy of the photon. Would the conclusion change if the free electron was moving with a constant velocity ? (ii) If the absorption of a photon by a free electron is ruled out as proved in (i) above, how does photoelectric emission take place at all ?

Derive de Broglie wave equation for material particles. (b) Why does photoelectric emission not take place if the frequency of incident radiation is less than threshold frequency ?

Photoelectric effect takes place in element A. Its work funcation is 2.5 eV and threshold wavelength is lambda . An other element B is having work function of 5 eV . Then find out the wavelength that can produce photoelectric effect in B.

Speed of photons in photoelectric emission is

Energy conversion in a photoelectric cell takes place from

Energy conversion in a photoelectric cell takes place from

The phenomenon of photoelectric emission was discovered in 1887 by

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