One sunny day Aditi and her brother test two umbrellas on the terrace:

(i) one is black

(ii) other a shiny silver.

After 15 minutes, the area under the shiny silver umbrella was cooler.

Answer the following:

(i) Which umbrella absorbs more heat from sun?

(ii) Which umbrella reflected more heat radiation?

(iii) When heat reaches us from sun, it reaches in which mode?

(i) The black umbrella absorbs more heat because dark colours are good absorbers of heat radiation.

(ii) The shiny silver umbrella reflects more heat radiation because shiny surfaces are good reflectors and poor absorbers of heat.

(iii) Heat from the Sun reaches us by radiation, as it can travel through vacuum without any medium.