Why are solar heating devices painted black form inside ?

What is solar heating device?

Explain why: The solar cooker is painted black from inside.

(a) With the help of a labelled diagram, explain the construction and working of a solar cooker. (b) Why is the solar cooker box painted black from inside ? (c ) Why is the solar cooker box covered with a glass sheet ?

(a) Explain why, a solar cooker box is (i) painted black from inside, and (ii) covered with a glass sheet. (b) Give two reasons why biogas is a good domestic fuel.

Why is the copper tube of a solar water heater painted black from outside ?

Why is the box of a solar cooker painted black from inside ?