Advertisements
Advertisements
Question
Explain briefly the process of heat transfer by radiation.
Advertisements
Solution
RADIATION. “The transfer of heat energy from a hot body to cold body directly, without heating the medium between two bodies is called RADIATION.”
The radiant heat or thermal radiation is of the form of ELECTROMAGNETIC WAVES. These waves can travel even in vacuum in all directions in straight line with the speed of light. They do not heat the medium through which they pass. Heat radiations are also called INFRA-RED RADIATIONS because the wavelength of heat radiations is longer than that of visible light. These radiations can cause heating effect only if they are absorbed by some material
APPEARS IN
RELATED QUESTIONS
Stainless steel pans are usually provided with copper bottoms. The reason for this could be that ______.
Write true or false for a given statement.
Liquids are heated by conduction and radiation.
Fill in the blank
Heat transfer in solids is by ______
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
Select the correct alternative
The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
______ of heat does not require a medium.
The earth receives heat from the sun by ______.
Why are the houses in Rajasthan painted white?
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
When a liquid boils, energy is absorbed.
