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When a metal surface is illuminated by light of wavelengths 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h=Planck's constant,c=velocity of light in air)

A

`2hcxx10^(6)J`

B

`1.5hcxx10^(-6)J`

C

`hcxx10^(6)J`

D

`0.5hcxx10^(6)J`

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The correct Answer is:
A
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