. The capillary tube of a clinical thermometer has kink
(a) To increase the expansion of mercury
(b) So that the level of mercury does not fall as soon as the thermometer is taken out of the mouth
(c) To use less mercury
(d) To help us see it better
(d) Radiation is the process by which heat travels without the help of a material medium. It is much the same as the process by which light travels. Light and heat are very similar. Both travel in straight lines, in all directions from a body emitting heat and light.