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Question

Photoelectric effect supports quantum nature of light because -

A
Both options (A) and (B)
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B
even when the metal surface is faintly illuminated, the photoelectrons leave the surface immediately.
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C
None of these
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D
there is a minimum frequency of light below which no photoelectrons are emitted.
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Solution

The correct option is A Both options (A) and (B)
Requirement of the frequency of the light above a minimum value irrespective of the intensity supports the quantum nature of light.

This shows that light has photon which are discrete energy packet.

Hence, option (C) is the correct answer.

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