Q. 14.1( 8 Votes )

State the laws of reflection of light. (AS1)

Answer :

Laws of reflection holds for regular reflection only. The light ray is incident on a plane mirror and is reflected via another path as shown in the figure. The point where the light intersects the surface of the mirror is called the point of incidence. The line drawn through the point of incidence which is perpendicular to the mirror is called the normal. The angle formed by the incident ray & the normal is called angle of incidence (i). The angle subtended by the normal & the reflected ray is known as angle of reflection(r). We live in a three-dimensional space. But we experience some activities in two-dimensional space. This two-dimensional space is called plane.


The Laws of Reflection states that:


First law : The angle of incidence is equal to the angle of reflection (i = r).


Second law : The incident ray, reflected ray and the normal at the point of incidence are in the same plane. This plane is called the plane of incidence.



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