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A light beam is travelling from region 1 to region 4(refer attachment).The refraction index in region 1,2,3,4 are shown in the attachment.The angle of incidence in the region 1 for which the beam just misses entering region 4 is

A light beam is travelling from region 1 to region 4(refer attachment).The refraction index in region 1,2,3,4 are shown in the attachment.The angle of incidence in the region 1 for which the beam just misses entering region 4 is

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Grade:12th pass

2 Answers

Hemanth Hemanth
16 Points
5 years ago
There will be Total Internal reflection in the region of
vaibhav124
13 Points
4 years ago
As we know T.I.R will occur at three and four 
Brcause medium are parallel 
no  sin theta = no/8 (sin pi2)
no sin theta = no /8 *1 
no/no sin thetq = 1/8 sin theta =1/8

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