Class 11Physics2 Thermal Properties of Matter: Heat TransferRadiation (General, Kirchoff's law, Black body, Prevost's Theory)
MediumWhy are the bottom layers of cooking vessels kept black in color?
(N/A) The bottom layers of cooking vessels are kept black in color because black surfaces are excellent absorbers of heat radiation. By absorbing maximum heat from the gas-stove flame,the vessel transfers more thermal energy to the food in a shorter amount of time,which makes the cooking process faster.
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$A$ total radiation of $400 \ J$ is incident on a body. If $20\%$ of the radiation is reflected and $120 \ J$ is absorbed,find the percentage of the transmittive power.
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