Question

state the law of reflection . describe how they can be vertified graphically..?​

Answer 1

Answer:

1.the incident ray ,reflected ray, and the normal all lies on same plane

2.a the angle of incidence is always equal to angle of reflection

Explanation:

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Answer 2

Laws of reflection for light reflecting from a smooth surface are as follows:

1. The incident ray, the reflected ray and the normal to the reflection surface at the point of the incidence lie in the same plane.

2. Angle of incidence is equal to the angle of reflection.

Verification of the Laws of Reflection:-

Introduction-

The laws of reflection are,

a.) The incident ray, reflected ray, and normal to the surface lies in the same plane.

b.) The angle of incidence i is equal to the angle of reflection r.

Apparatus-

A plane mirrors, scale, protractor, thermocol sheet, white paper, pins.

Procedure-

1.Fix the white paper on the thermocol sheet with the help of pins.

2.Place the mirror near to one edge of the paper and mark its position.

3.Place two pins vertically on one side of the normal so that line joining two pins make an angle of approximately 30 degree with the normal.

4.See image of two pins from other side of the normal and place a pin vertically so that it is in line with images of other two pins. Similarly, place one more pin at some distance from this pin.

5.Extend the lines. Measure angle of incidence and angle of reflection.

6.Repeat for two more incident angles (say 45 degree and 60 degree).

7.Now, see the head of the pins in step (3). Raise one of the pin and press another pin. Now repeat step (4) such that images of the pin-head are aligned. Visualise the plane containing incident ray, reflected ray and normal. You may place a paper on this plane. Raise another pin and visualize again.

Discussion-

Write the results in the form of a table.