Dual Nature of Matter

JEE Main level, single correct, medium

199 of 200

Question 199 of 200

Two identical photocathodes receive light of frequencies f1\mathrm{f}_1 and f2\mathrm{f}_2. If the velocities of the photo electrons (of mass m\mathrm{m} ) coming out are respectively v1\mathrm{v}_1 and v2\mathrm{v}_2, then

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Answer: (A) v12−v22=2hm(f1−f2)v_1^2-v_2^2=\frac{2 h}{m}\left(f_1-f_2\right)

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