Thermal Properties of Matter questions
823 published questions with worked solutions.
- The temperature of sun is 5500 K and it emitts maximum intensity radiation in the yellow region ( _m = 5.5 10^ -7 m). The maximum...
- At the temperature of the sun (6000k), the wavelength corresponding to the maximum radiation is about 550 nm. What will be the...
- The black body have
- A piece of charcoal and a piece of shining steel of the same area are kept for a long time in an open lawn in bright sun
- On investigation of light from three different stars A, B and C it was found that in the spectrum of A, the intensity of red...
- Three identical spheres of different materials iron gold and silver are at the same temperature. The one that radiates more...
- A polished metal plate with a rough black spot on it, is heated to about 1500 K and quickly taken to a dark room. The spot will...
- If a body is good absorber of heat then it is
- The essence of Kirchhoff's law is that a good absorber must be a
- Relation between emissivity e and absorptive power a is (for black body)
- Half part of ice block is covered with black cloth and rest half is covered with white cloth and then it is kept in sunlight....
- If between wavelength and + d , e_ and a_ be the emissive and absorptive powers of a body and E_ be the emissive power of a...
- Distribution of energy in the spectrum of a black-body can be correctly represented by
- The Kirchhoff's law leads to the conclusion that the good radiators of thermal radiations are
- If E is emissive power and 'a' is the coefficient of absorption of a body at any temperature, E_b is the emissive power of a...
- Kirchhoffs law leads to the conclusion that the good radiators of thermal radiations are:
- Who propounded the hypothesis that exchange of heat radiation takes place between the bodies at all temperature?
- Which of the following law states that _m is inversely proportional to absolute temperature?
- Two bodies one hot and the other cold are kept in vacuum. What will happen to the temperature of the hot body after some time? :
- A body which absorbs all the radiations incident over it is called a :
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