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Question
Show the graphical representation of radiant power of a black body per unit range of wavelength as a function of wavelength.
Solution
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Answer in brief:
What is a perfect blackbody? How can it be realized in practice?
Draw a neat labeled diagram of Ferry’s black body.
Explain the construction and working of Ferry’s black body.
Compare the rates of emission of heat by a blackbody maintained at 627°C and at 127°C, if the black bodies are surrounded by an enclosure at 27°C. What would be the ratio of their rates of loss of heat?
Why is a conical projection in front of the hole i.n Fen-y's blackbody?
The energy spectrum of a black body exhibits a maximum around a wavelength '`lambda`'. The temperature of a black body is now changed such that the energy is maximum around a wavelength 3`lambda`/4. The power radiated by a black body will now increase by a factor of ______.
A black body has maximum wavelength `lambda_"m"` at temperature 2200 K. wavelength at temperature 3300 K will be ______.
For a perfectly black body, the graph is plotted between the frequency of the radiation with maximum intensity (vm) and the absolute temperature T. Out of the following, which is the correct graph?
A blackbody at 327 °C, when suspended in a black enclosure at 27 °C, loses heat at a certain rate. Find the temperature of the body at which its rate of loss of heat by radiation will be half of the above rate. Assume that the other conditions remain unchanged.
Draw a neat labelled diagram of Ferry’s perfectly black body.
