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NEET2005PhysicsDual Nature of MatterActual

The photosensitive metallic surface has work function h v₀ fall on this surface, the electrons come out with a maximum velocity of 4 10^6 ~m / s . When the photon energy is increased 5 h v₀ . Then maximum velocity of photoelectrons will be:

Options

  1. A2 10^7 ~m / s
  2. B2 10^6 ~m / s
  3. C8 10^6 ~m / s
  4. D8 10^5 ~m / s

Correct answer

C. 8 10^6 ~m / s

Step-by-step solution

According to the question gathered 2 h v₀=h v₀+ 1 2 m (4 10^6 )^2 5 h v₀=h v₀+ 1 2 m v^2 4 1 2 m (4 10^6 ) 1 2 m v^2 v=8 10^6 ~m / s gathered

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