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JEE Mains · Physics · STD 12 - 11. Dual nature of radiation and matter
Two streams of photons, possessing energies to five and ten times the work function of metal are incident on the metal surface successively. The ratio of the maximum velocities of the photoelectron emitted, in the two cases respectively, will be.
- A \(1: 2\)
- B \(1: 3\)
- C \(2: 3\)
- D \(3: 2\)
Answer & Solution
Correct Answer
(C) \(2: 3\)
Step-by-step Solution
Detailed explanation
\(\frac{1}{2} m v_{1}^{2}=4 \phi\) \(\frac{1}{2} mv _{2}^{2}=9 \phi\) \(\frac{ v _{1}}{ v _{2}}=\frac{2}{3}\)
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