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Question: The threshold wavelength for a metal whose work function is W<sub>0</sub> is l<sub>0</sub>. The thre...

The threshold wavelength for a metal whose work function is W0 is l0. The threshold wavelength for a metal whose work function W0/2 is –

A

λ04\frac{\lambda_{0}}{4}

B

λ02\frac{\lambda_{0}}{2}

C

2l0

D

4l0

Answer

2l0

Explanation

Solution

f = W0 =hcλ\frac{hc}{\lambda}