Question 11
You will need:
a darkened room, a powerful flashlight, a plane mirror, a sheet of white paper, a piece of black plastic or black paper, a pin, masking tape
1 Make a small hole with a pin in the black plastic. Cover the flashlight glass with the black plastic so that the pin hole is in the middle of the flashlight glass. Secure with masking tape.
2 One person should hold the mirror (or you can fix the mirror to the wall).
3 Hold the white paper in front of the mirror, about 50 cm away from it. The mirror must be upright.
4 Shine your flashlight at the mirror. You will get a thin ray of light passing through the pin hole.
5 Observe the angle at which the ray of light from the flashlight reaches the mirror.
6 Observe the angle at which the light reflects off the mirror.
7 Observe the point at which the reflected light falls on the white paper.
8 Shine your flashlight at different angles from the mirror. Observe the rays of light that arrive at the mirror and reflect off the mirror onto the paper.
a darkened room, a powerful flashlight, a plane mirror, a sheet of white paper, a piece of black plastic or black paper, a pin, masking tape
1 Make a small hole with a pin in the black plastic. Cover the flashlight glass with the black plastic so that the pin hole is in the middle of the flashlight glass. Secure with masking tape.
2 One person should hold the mirror (or you can fix the mirror to the wall).
3 Hold the white paper in front of the mirror, about 50 cm away from it. The mirror must be upright.
4 Shine your flashlight at the mirror. You will get a thin ray of light passing through the pin hole.
5 Observe the angle at which the ray of light from the flashlight reaches the mirror.
6 Observe the angle at which the light reflects off the mirror.
7 Observe the point at which the reflected light falls on the white paper.
8 Shine your flashlight at different angles from the mirror. Observe the rays of light that arrive at the mirror and reflect off the mirror onto the paper.
