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MHT CET202016 Oct 2020Evening ShiftPhysicsDual Nature of MatterActual

The light of wavelength ^ incident on the surface of metal having work function emits the electrons. The maximum velocity of electrons emitted is (c= velocity of light, h=Planck's constant, m=mass of electron )

Options

  1. A[ 2( ~h C - ) m ]
  2. B[ 2( ~h c - ) m ]^ 1 2
  3. C[ 2(h C - ) m ]^ 1 2
  4. D[ 2( ~h v - ) mC ]

Correct answer

B. [ 2( ~h c - ) m ]^ 1 2

Step-by-step solution

(C) hv - = E _ = 1 2 mv ² hc - = 1 2 mv ² v ²=2 ( hc - ) m

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