Question

Give an experiment to show that black surface is a better radiator of heat.

Answer 1

Aim: To show that black surface is a better radiator of heat than a white surface.

Materials required: Two identical tin cans, water and two thermometers.

Procedure:

1. Take two identical cans.
2. Paint one of them black and the other white.
3. Fill both the tin cans with equal quantities of boiling water.
4. Take two thermometers and dip them in boiling water.
5. Note the temperature in each can after every five minutes.

Observation: We will observe that the temperature of water in the black can falls more quickly than in the white can.

Conclusion: A black surface is a good radiator of heat than a white surface.