Class 11Physics2 Thermal Properties of Matter: Heat TransferRadiation (General, Kirchoff's law, Black body, Prevost's Theory)
EasyWhat is radiation and radiant energy?
(N/A) Radiation is the process of heat transfer in which energy is emitted by a body in the form of electromagnetic waves,which can travel through a vacuum without the need for any material medium.
Radiant energy is the energy carried by these electromagnetic waves. When this energy falls on a body,it is partially absorbed,reflected,or transmitted. The part that is absorbed increases the internal energy of the body,thereby raising its temperature.
Radiant energy is the energy carried by these electromagnetic waves. When this energy falls on a body,it is partially absorbed,reflected,or transmitted. The part that is absorbed increases the internal energy of the body,thereby raising its temperature.
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Similar Questions
About black body radiation,which of the following is the wrong statement?
At a high temperature,a body emits radiation of wavelengths $\lambda_1, \lambda_2, \lambda_3,$ and $\lambda_4$ only. At a lower temperature,which of the following wavelengths will it absorb?
Medium
View Solution$Assertion$ : The Earth without an atmosphere would be inhospitably cold.
$Reason$ : All heat would escape in the absence of an atmosphere.
$Reason$ : All heat would escape in the absence of an atmosphere.
If between wavelength $\lambda$ and $\lambda + d\lambda$,$e_\lambda$ and $a_\lambda$ are the emissive and absorptive powers of a body,respectively,and $E_\lambda$ is the emissive power of a perfectly black body,then according to Kirchhoff's law,which of the following is true?
Medium
View SolutionIf a vessel with black spots is heated to a very high temperature and then taken into a dark room,then:
Easy
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