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The minimum energy required for the emis...

The minimum energy required for the emission of photoelectron from the surface fo a metal is ` 4. 94 xx 10 ^(19) J`. Calcualte the critical reequency and the corresponding wavelength of the critical frequency and the corresponding wavelngth of the photon requred to ejerct the electron. `( h = 6. 6 xx 10^(-234) J esc^(-1))`.

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