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MHT CET202122 Sep 2021Evening ShiftPhysicsDual Nature of MatterActual

The light of wavelength ' ' is incident on the surface of metal of work function and emits the electron, The maximum velocity of electron emitted is [ m = mass of electron and h = Planck's constant, c= velocity of light]

Options

  1. A[ 2( hc - )^ 1 2 ~m ]
  2. B[ 2( hc - ) mc ]
  3. C[ 2( hc - ) m ]
  4. D[ 2( hc - ) m ]^ 1 2

Correct answer

D. [ 2( hc - ) m ]^ 1 2

Step-by-step solution

We have 1 2 mv _ ^2= hc - = hc - aligned & V _ ^2= 2( hc - ) m & V _ = 2( hc - ) m aligned

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