MHT CET 2024 Physics question
Two identical photocathodes receive light of frequencies 'n' and 'n'. If the velocities of the emitted photoelectrons of mass 'm' are 'V' and 'V' respectively, then (h=Plank's constant)
Answer: (D)
Solution
Einstein's photoelectric equation for each photocathode (same work function ): and . Subtracting eliminates : , i.e. . The
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