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Light of wavelength lambda falls on meta...

Light of wavelength `lambda` falls on metal having work functions `hc//lambda_(0)` . Photoelectric effect will take place only if :

A

`lambda ge lambda_(0)`

B

`lambda ge 2lambda_(0)`

C

`lambda le lambda_(0)`

D

`lambda le lambda_(0)//2`

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The correct Answer is:
C
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