The light radiation of wavelength 6000 Å...

The light radiation of wavelength 6000 Å falls on a metal . The threshold frequency of a metal surface is `4 xx 10^(14)` Hz . The maximum velocity of the emitted photoelectrons is

`3.0 xx 10^(5) ` m/s

`3.8 xx 10^(-5)` m/s

`3.8 xx 10^(5) ` m/s

`8.3 xx 10^(5)` m/s

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