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For given metal work function is W(0) an...

For given metal work function is `W_(0)` and threshold wavelength is `lambda_(0)`.If metal has work function `(W_(0))/(2)` then what will be threshold wavelength ?

A

`4lamda_0`

B

`2lamda_0`

C

`(lamda_0)/(2)`

D

`(lamda_0)/(4)`

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