1. Take a drawing board, spread a white sheet on it.
2. Draw a semicircle on the white sheet.
3. Mark the angles from 0° to 180° with the help of protractor.
4. Take two plane mirrors of same size join them with cellophane tape as shown in the figure.
5. Keep the mirrors on the semicircle such that the angle between the mirrors is 120° .
6. Now bring a burning candle in between the mirrors.
7. Observe the number of images formed by the two Mirrors.
8. Change the angles between the mirrors from 120° to 90°, 60°, 45°, and 30° respectively.
9. Observe the number of images formed in each position. Tabulate your observation.
In this way we. can derive the formula to find out the number of images formed between two mirrors.
Number of images (n) = (360°/θ) -1 where 0 is the angle between the mirrors.
