A ray of light travels from into a combination of 4 parallel sided slabs P, Q, R and S. of thickness
2cm, 2.5cm, 1cm and 4.5cm, having refractive indices 1.3, 1.5, 1.2, 1.3. The speed of light in the
slabs is observed as C1,C2, C3 and C4. Then
(1) C1 > C2 > C3 < C4.
(2) ci <C2 < C3 > C4
(3) C1 > C2, C2< C3 and ci = C4.
(4) C1 > C2 > C3 and C2 > Ch.
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Answer:
it travle upto150km per socond
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