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Light of wavelength 4000overset@A is inc...

Light of wavelength `4000overset@A` is incident on a metal of work function `3.2 xx 10^-19 J`. The maximum kinetic energy of the emitted electron is

A

`0.75 xx 10^-19 J`

B

`1.1 xx 10^-19 J`

C

`1.75 xx 10^-19 J`

D

`2.2 xx 10^-19 J`.

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