Question

A plane mirror deviates a light ray by 80 degree what is the angle of incidence​

Answer 1

Answer:

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Explanation:

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Answer 2

Given that,

Angle θ=80 °

We know that,

The reflection of light perpendicular to the first mirror it takes an angle of 90 °

and since it is incident on the other plane mirror so, it will take an angle of 90 °

as well.

Now, the total deviation

=90 °

+90 °

=180 °

For every plane mirror of any angles

Hence, the total deviation is 180 °

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