Two plane mirrors are inclined to …
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Gaurav Seth 5 years, 1 month ago
Given that,
Two plane mirrors are inclined to each other at a certain angle.
Incident angle = 10°
Let the angle between the mirror is θ.
On second mirror ray of light retraces its path
After five reflection it will be same.
So, ray of light falls normally on the second mirror
The normal angle is
We know that,
From snell's law,
Incident angle is equal to the reflection angle.
We need to calculate the angle b
Using formula for b
Put the value into the formula
We need to calculate the angle between the mirror
Using formula of angle
Put the value into the formula
Hence, The angle between the mirror is 10°.
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