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Threshold frequency for a metal is 10^(1...

Threshold frequency for a metal is `10^(15) Hz`. Light of `lambda = 4000 Å` falls on its surface . Which of the following statements is correct ?

A

No photoelectric emission takes place

B

Photo-electrons come out with zero speed

C

Photo-electrons come out with 103 m/sec speed

D

Photo-electrons come out with 105 m/sec speed

Text Solution

Verified by Experts

The correct Answer is:
A
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