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Laws of Reflection

Which law det...

Question

Which law determines the direction of the reflected ray from a plane mirror?

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Solution

The second laws of reflection determines the direction of the reflected ray from the plane mirror. This law is stated in the following manner:

The angle of incidence (between the incident ray and the normal to the surface ) is equal to the angle between the reflected ray and the normal to the surface (angle of reflection).

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Q. The reflected ray from a plane mirror is incident on another plane mirror which is placed perpendicular to the first. If the angle of incidence on the first mirror is

30^{0}

, determine the glancing angle of reflection on the second mirror.

Q. Two plane mirrors are inclined to each other at an angle of

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θ

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Q. Identify the incorrect statement regarding the reflection of light from a plane mirror when a light ray is incident obliquely.

\to R, \to I

\to N

represents the vectors along the reflected ray, incident ray and normal direction.

The laws of reflection state that the incident ray, reflected ray and the normal to the surface of mirror lie in different planes.

State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.

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