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What willl be the minimum angle of incid...

What willl be the minimum angle of incidence such that the total internal reflection occurs on both the surfaces? `

Text Solution

Verified by Experts

The correct Answer is:
`60^(@)`

Taking tanT.I.R.at interface(2)
`2sinC=sqrt(3) sin90^(@) rArr SinC=(sqrt(3))/(2) rArr C=60^(@)`
`C=60^(@),theta=60^(@)`
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