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The maximum kinetic energy of the photoe...

The maximum kinetic energy of the photoelectron is found to be `6.6x10^-19`J when the metal is irradiated with a radiation of frequency `2x10^15`Hz the threshold frequency of the metal is about

A

`1x10^15s^-1`

B

`2x10^15s^-1`

C

`3x10^15s^-1`

D

`1.5x10^15s^-1`

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A
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