Light rays travel from vacuum into glass whose refractive index is 1.5 If the angle of incidence is `30^(@)` calculate the angle of refraction inside the glass.

Explanation

According to Snell . s law,
`(sini)/(sinr)=(mu_(2))/(mu_(1))`
`mu_(1)sini-mu_(2)sinr`
Here `mu_(1)=1.0mu_(2)=1.5,i=30^(@)`
`(1.0)sin30^(@)=1.5sinr`
`1xx(1)/(2)=1.5sinr`
`sinr=(1)/(2xx1.5)=(1)/(3)=(0.333)`
`r=sin^(1)(0.333)`
`r=19.45^(@)`