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A ray of light is incident at the glass-...

A ray of light is incident at the glass-water interface at an angle i. It merges finally parallel to the surface of water. Then, the value of `mu_(g)` would be

Text Solution

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Applying snell.s law (`mu sin i`= constant)
at first and second interfaces, we have
`mu_1 sin i= mu_2 sin i_2, But mu_1= mu_(glass) i_1=i`
`mu_2=mu_(air) =1 and i_2=90^@`
`therefore mu_g sin i=(1) (sin90^@) or mu_g=1/(sin i) `
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