AP EAMCET · PHYSICS · Dual Nature of Matter
Photoelectrons are emitted with maximum velocity \(\mathrm{v}\) when light of frequency \(3 \mathrm{f}\) incidents on a photosensitive material of work function \(2 \mathrm{hf}\). If the frequency of the incident light is \(4.25 \mathrm{f}\), the maximum velocity of the emitted photoelectrons is
(h-Plank's constant)
- A \(0.5 \mathrm{v}\)
- B V
- C \(1.5 \mathrm{v}\)
- D \(2 \mathrm{v}\)
Answer & Solution
Correct Answer
(C) \(1.5 \mathrm{v}\)
Step-by-step Solution
Detailed explanation
Initial frequency, \(f_1=3 f\) Initial velocity \(\mathrm{v}_1=\mathrm{v}\) Work function \(\phi=2 \mathrm{hf}\) final frequency, \(\mathrm{f}_2=4.25 \mathrm{f}\) final velocity, \(\mathrm{v}_2=\) ? Kinetic energy is given as, \(K E=h f-\phi\)…
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