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When a metal surface is illuminated by a...

When a metal surface is illuminated by a light of wavelength 400nm and 250 nm . The maximum velocites of the photo electrons ejected are v and 2v respectively. The work function of the metal is (h= Planck's constant e= 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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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-PRACTICE EXERCISEX
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