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Higher Study | Heat Transfer | Radiation

All radiations in a black body are
Stefan Boltzmann law is applicable to
A perfect black body is
A satellite floats in deep space with very high velocity. It will continuously lose heat by
A fraction of radiative energy leaving one surface that strikes the other surface is called
Which of the following statements are correct for a blackbody? 1. A blackbody continues to emit radiation even when it is in thermal equilibrium with its surroundings. 2. A blackbody is a perfect emitter. 3. Absorptivity, α = 1 represents a black surface.
For the same type of shapes, the value of Radiation Shape Factor will be higher when surfaces are
For an absolutely white or specular body- (where α = absorptivity, ρ = reflectivity, τ = transmissivity)
What is the name of ‘h’ in given equation, if difference of energy E between the higher energy state E2 and the lower energy state E1? E = E2 - E1 = h
The body which reflects the entire radiation incident on it is said to be
Which mode of transportation of heat is essentially not required the medium?
Consider the following statements: 1. Absorptivity depends on wave length of incident radiation waves 2. Emissivity is dependent on wave length of incident radiation waves Which of the above statements is/are correct?
During very cold weather conditions, cricket players prefer to wear white woolen sweaters rather than colored woolen sweaters. The reason is that white wool comparatively: 1. Absorbs less heat from the body 2. Emits less heat to the atmosphere Which of the above statements is/are correct?
Which non-metallic body is expected to have highest value of emissivity?
Which surface will have the least emissivity?
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