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BITSAT2009PhysicsDual Nature of MatterActual

In a photoelectric experiment, with light of wavelength , the fastest electron has speed v . If the exciting wavelength is changed to 3 / 4 , the speed of the fastest emitted electron will become

Options

  1. Av 3 4
  2. Bv 4 3
  3. Cless than v 4 3
  4. Dgreater than v 4 3

Correct answer

D. greater than v 4 3

Step-by-step solution

1 2 mv ²= hc - array l 1 2 ~m ^ = hc (3 / 4) - = 4 hc 3 - Clearly, v ^ > 4 3 v array

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