If a light of wavelength lambda = 800nm ...

If a light of wavelength `lambda = 800nm` is in incident on a metal surface the maximum kinetic energy of emitted electrons is T. If light of wavelength `lambda = 500nm` is incident on the same metal, the maximum kinetic energy of emitted electrons is 2T. Find the work function of the metal

0.62 eV

1.24 eV

7.78 eV

0.82 eV

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