Question

Why the dark colour is good absorber of heat​

Answer 1

Answer:

dark colored objects posses higher coefficient of absorption (ratio of light absorbed to the light incident on the object.) thus they absorb most of the light energy incident.

Answer 2

A black object absorbs all wavelengths of light and reflects none and that's why it appears black. Consequently, black absorbs the most heat. Objects that are white, on the other hand, reflect all wavelengths of light and that's why they appear white to us, therefore absorb the least heat.