Question

Two plane mirrrors,m and n are placed parallel to each other as shown in the figure.A ray AB is incident on the first mirror. It is reflected twice and emerges in the ddirection CD. Prove that AB//CD​

Answer 1

Angle1=Angle2

Angle3=Angle4

Because, Angle of incidence=Angle of reflection

Normals CN and SM form a square CNSM

Because, All Angles are 90 degrees and all sides are equal.

:.angle3 =angle2. Because diagonals of a square bisect the angles

:.by alternate interior angles property, AB//CD

Answer 2

Step-by-step explanation:

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