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Q)

Which statement is incorrect regarding photoelectric effect?

(a) When light of appropriate frequency falls on metal surface, electron emission takes place instantaneously.

(b) When light of very low intensity falls on metal surface no photoelectric effect takes place.

(c) C. For light waves having same frequency but different intensities, maximum KE of liberated photoelectrons would be same.

(d) Light waves having some upper limit of wavelength can cause the photoelectric effect to take place.

1 Answer

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A)
Ans : (b)
When light of very low intensity falls on metal surface no
photoelectric effect takes place.

 

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