What is the power of a plane mirror?
2. When the angle of incidence is 90°. What is the angle of refraction?
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Explanation:
ANSWER 1
Plane mirror always produces virtual and erect image and same size of the object behind it. However, the focal length of the plane mirror is infinite So; its optical power is Zero
ANSWER 2
Given: angle of incident =90, angle of refraction =?
So , here the angle is 90 degree it means the light rays fall perpendicularly it means the angle of refraction is also 90 degree.
Hence, angle of refraction is 90 degree
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