Objective :-To prove the law of reflection through a plane mirror.

Things required:-Soft board,white sheet of paper , optical pins , mirror , pencil, protactor and ruler .

Method :-

1-Place the paper on the board and fix

2-Place the mirror vertically on the white sheet of paper and trace its edge.

3-Draw a line at right angles to the edge of the edge of the mirror to act as the normal-ON.

4- Stating with angle i as 30 degree , draw an incident ray and place two pins, P and Q along it as shown5-With your eyes at position shown, place two other pins R and S to coincide with the images of P and Q as seen in the mirror

6-Remove pins R and S and join the dots left with a straight line

7-Measure and record angle r.

8-Repeat procedure 4,5,6 and 7for angles i = 35 degree, 40 degree, 45 degree, 50 degree and 55 degree.

Record the results in a table.

On carefully observing the result on will clearly see that :-

1-The angle of incidence equals the angle of reflection.

2-Incident ray, Reflected ray and the normal at the point of incidence lie in the same plane.

Hence the laws of reflection proved.