The radiations of 1 eV and 2.5 eV are in...

The radiations of 1 eV and 2.5 eV are incident on a metal having a work function of 0.5 eV . The ratio of their maximum velocities is

`(1)/(2)`

`(1)/(4)`

`(2)/(5)`

`sqrt((5)/(2))`

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