question_answer

Directions Q. No. 2 are based on the following paragraph. An initially parallel cylindrical beam travels in a medium of refractive index \[\mu (I)={{\mu }_{0}}+{{\mu }_{2}}I,\] where \[{{\mu }_{0}}\] and \[{{\mu }_{2}}\] are positive constants and \[I\] is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius. The speed of light in the medium is ?       AIEEE  Solved  Paper-2010

A) maximum on the axis of the beam

B) minimum on the axis of the beam

C) the same everywhere in the beam

D) directly proportional to the intensity I