1.

The angle of deviation of a light ray reflected by a plane mirror is 150^(@). The angle of reflection is _____.

Answer»

`30^(@)`
`60^(@)`
`15^(@)`
`10^(@)`

Solution :The ANGLE of DEVIATION d =180-2i=180-2r
150=180-2r
`2r=30^(@)r=15^(@)`


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