Question

True or false?

(a) Glass is a bad conductor of heat.

(b) In a thermos flask, hot things remain hot and cold things become warm.

(c) Radiation of heat depends upon the colour of the outer surface of the body.

(d) During radiation the particles of the medium vibrate.

Answer 1

(a) True

(b) False

In a thermos flask, hot things remain hot and cold things remain cold.

(c) True

(d) False

During radiation the particles of the medium do not vibrate. This is because radiation does not require any medium for propagation