Question

Two plane mirrors are placed in angle 60 degree each other a light ray incident on first mirror and after striking second mirror it retraces its path.Angle of the angle of incidence of light ray with first Mirror is

Answer 1

Angle of the angle of incidence of light ray with first Mirror is 60 degree

Explanation:

In order to retrace the path of the light we know that the light must have to strike normally on the second mirror

So here we can say that

angle of incidence on second mirror must be 90 degree

now from geometry we will say that

angle of incidence on the first mirror will be

$i = 90 - \theta$

here we have

$\theta + 90 + 60 = 180$

$\theta = 30$

now we have

$i = 90 - 30$

$i = 60 degree$

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Topic : Reflection of light

https://brainly.in/question/9374072

Answer 2

Answer:

angle of incident is equal to 60 degree