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Explain critical angle. Light travels in...

Explain critical angle. Light travels in two media A and B with speeds `2xx10^(8) ms^(-1)` and `2.4 xx10^(8) ms^(-1)` respectively. Calculate the critical angle between them.

Text Solution

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According to snell s law
`d_(mu_(r ))` or `"denser"_(mu_("rarer"))=(sin i)/(sin r)`
as `v_(d) =2xx10^(8) ms^(-1)` and `v_(r )=2.4 xx10^(8) ms^(-1)`
`rarr C= sin^(-1) (5/6) =56.4^(@)`
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