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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

`4:1`

B

`1:4`

C

`1:5`

D

`1:2`

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