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Radiations of two photon’s energy, twice...

Radiations of two photon’s energy, twice and ten times the work function of metal are incident on the metal surface successsively. The ratio of maximum velocities of photoelectrons emitted in two cases is

A

`1:2`

B

`1:3`

C

`1:4`

D

`1:1`

Text Solution

Verified by Experts

The correct Answer is:
B
`1/2 mv_1^2 = 2W_0 - W_0 = W_0` and
`1/2 mv_2^2 = 10 W_0 - W_0 = 9 W_0`
`therefore v_1/v_2 = sqrt((W_0)/(9W_0) ) = 1/3`
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DISHA PUBLICATION-DUAL NATURE OF RADIATION AND MATTER-EXERCISE -1 : CONCEPT BUILDER
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