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All India Engineering / Architecture Entrance Examination (AIEEE)

CBSE Guess > AIEEE > AIEEE Papers > 2010 > Physics

AIEEE 2010 Physics

Q. 26. As the beam enters the medium, it will

  1. diverge
  2. converge
  3. diverge near the axis and converge near the periphery
  4. travel as a cylindrical beam

Sol:

converging beam

Answer : (2)

Q. 27. The initial shape of the wavefront of the beam is

  1. convex
  2. concave
  3. convex near the axis and concave near the periphery
  4. planar

 Answer : (4)

Q. 28.The speed of light in the medium is

  1. minimum on the axis of the beam
  2. the same everywhere in the beam
  3. directly proportional to the intensity I
  4. maximum on the axis of the beam

Sol:

Refractive index is maximum at axis. Therefore speed of light at axis will be minimum.

Answer : (1)