Question

explain an activity with diagram to show that dark colours are good emitters of heat. Class 7​

Answer 1

Answer:

If we take a black umbrella outside when the sun is reflecting the most heat, we will be able to see that the black colour emits more heat.

Explanation:

It is because a dark colour like black absorbs all the colours from the sunlight. The sunlight consists of the seven basic colours of the rainbow. So when a colour appears dark it is because it has absorbed the wavelength of all the seven colours. That is why we use black umbrella in summer.