1.

The photoelectric work function of a certain metal is 2.5 eV. If the metal is separately irradiated with photons of energy 3 eV and 4.5 eV, the ratio of the respective stopping potentials is(A) 1 (B) \(\cfrac23\)(C) \(\cfrac14\)(D) \(\cfrac15\)

Answer»

Correct option is (B) \(\cfrac23\)



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