Question

An initially parallel cylindrical beam travels in a medium of refractive index μ(i) = μ0 +μ1 where μ0and μ1where and are positive constants and i is the intensity of the light beam. the intensity of the beam is decreasing with increasing radius. the initial shape of the wave front of the beam is i. convex ii. concave iii. near the axis and concave near the periphery iv.planar

Answer 1

HEYA MATE!!!!

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according to above statement the beam is convex...

hope it helps u dear mate...

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Answer 2

$\huge\mathfrak\red{Bonjour\:mate}$

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♠️convex is the answer