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The maximum velocities of the photoelect...

The maximum velocities of the photoelectrons ejected are v and 2v for incident light of wavelength 400 nm and 250 nm on a metal surface respectively. Calculate the work function of the metal. Given `h = 6.63 xx 10^(-34)J.s and c = 3 xx 10^(8) m.s^(-1)`

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The correct Answer is:
`2.486 eV`
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