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Dual Nature of Radiation and Matter question

2022 · Q159
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Dual Nature of Radiation and Matter question

2022 · Q159

NEETPhysicsDual Nature of Radiation and MatterMCQ+4 / −1

The threshold frequency of a photoelectric metal is v0. If light of frequency 4v0 is incident on this metal, then the maximum kinetic energy of emitted electrons will be :

  1. A
    4 hv0
  2. B
    hv0
  3. C
    2 hv0
  4. D
    3 hv0
View written solutionFree

Correct answer: D

According to Einstein's photoelectric equation

$${(K.E)_{\max }} = hv - h{v_0}$$

$${(K.E)_{\max }} = h(4{v_0}) - h{v_0}$$

$${(K.E)_{\max }} = 3h{v_0}$$

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