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AP EAMCET202421 May 2024Evening ShiftPhysicsDual Nature of MatterActual

The maximum wavelength of light which causes photoelectric emission from a photosensitive metal surface is ₀ . Two light beams of wavelengths ₀ 3 and ₀ 9 incident on the metal surface. The ratio of the maximum velocities of the emitted photoelectrons is

Options

  1. A3: 4
  2. B1: 3
  3. C1: 2
  4. D2: 3

Correct answer

C. 1: 2

Step-by-step solution

By Einstein's photoelectric equation, aligned & E = _ o + K _ & hc = hc _ o = 1 2 mv _ ^2 aligned aligned & v_ ^2= 2 mc m ( 1 - 1 _ o ) & v _ ^2, 1 v _ , 2 ^2 = ( 1 ₀ / 3 - 1 ₀ ) ( 1 ₀ / 9 - 1 ₀ ) = 2 ₀ 8 ₀ = 1 4 & V_ , 1 V_ , 2 = 1 2 aligned

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