Question

E. Answer the following in detall
Describe an experiment to show that the angle of indidence is equal to the angle of reflection​

Answer 1

Answer:

The angle of incidence <i is equal to the angle of reflection <r, both angles are measured with respect to the normal to the mirror. The experiment to verify these laws is as follows: ... Place the plane mirror on it and trace its outline on the paper. Then remove the mirror and draw the 'normal.

Answer 2

Explanation:

Take a wooden drawing board and fix a white sheet of paper on it. In the middle of paper draw a straight line KK\ Mark a point B on it. Draw a perpendicular BN. Place a mirror XX’ on line KK’ such that polished side of mirror is along the line. Hold-the mirror in the mirror holder.

Fix two steel pins P and Q on the straight line AB at least 10 cm apart. Look for the images of the pins P and Q and fix two pins P Q’ such that P’, Q’ and images of P and Q are all in the same straight line. Remove the pins and draw small circles around the pin pricks.

Remove the mirror also. Join P’Q’ and produce the straight line to meet at B.

Measure ∠ABN = i and ∠CBN = r.

It is found that ∠i = ∠r. This proves that Angle of Incidence is equal to Angle of Reflection.

As the incident ray, the reflected ray and the normal lie in the plane of paper, therefore, they lie in the same plane.

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