Q.
Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is -
a. 1 : 2 b. 1 : 1 c. 1 : 5 d. 1 : 4
PMT Main 2012
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