1.

A ray of light enters in air from glass. What wi be deviation angle if angle of incidence is 50^@ Take refractive index of glass 1.5.

Answer»

`0^@`
`80^@`
`50^@-sin^(-1)((SIN50^@)/(1.5))`
`sin^(-1)(1.5 sin50^@)-50^@`

Solution :
ACCORDING to Snell.s LAW,
`1.5sin 50^@=(1)sinr`
`therefore r=sin^(-1)(1.5sin50^@)`
Now,`delta=r-50^@`
`delta=sin^(-1)(1.5sin50^@)`


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