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An initially parallel cylindrical beam travels in a medium of refractive index (I)= ₀+ ₂ I , where ₀ and ₂ are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius. As the beam enters the medium, it will

Options

  1. Adiverge
  2. Bconverge
  3. Cdiverge near the axis and converge near the periphery
  4. Dtravel as a cylindrical beam

Correct answer

B. converge

Step-by-step solution

As intensity is maximum at axis, will be maximum and speed will be minimum on the axis of the beam. beam will converge.

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