1.

Ordinary light incident on a glass slab at the polarizing angle suffers a deviation of 22^(@). The value of angle of refraction is .......

Answer»

`74^(@)`
`22^(@)`
`90^(@)`
`34^(@)`

Solution :
From figure `theta_(p)=r+22^(@) ""..(1)`
Now from proof of Brewster.s law.
`theta_(p)+90^(@)+r=180^(@)`
`:.` From RESULT (1)
`r+22^(@)=r=90^(@)`
`:.2r=68^(@)`
`:.r=34^(@)`


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