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Light of two different frequencies whose...

Light of two different frequencies whose photons have energies 1eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum kinetic energy of emitted electrons will be:

A

`1:4`

B

`4:1`

C

`1:2`

D

`2:1`

Text Solution

Verified by Experts

The correct Answer is:
A
`(K_(1))/(K_(2)) = (hv_(1) - phi_(1))/(hv_(2) - phi_(2)) = (1 - 0.5)/(2.5 - 0.5) = 1/4`
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ALLEN-SIMPLE HARMONIC MOTION-Exercise-01
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