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Q. |
A black body can absorb radiations of |
A. | lower wavelengths only |
B. | intermediate wavelengths only |
C. | higher wavelengths only |
D. | all wavelengths |
Answer» D. all wavelengths | |
Explanation: A black body is a theoretical object that absorbs 100% of the radiation that hits it. Therefore it reflects no radiation and appears perfectly black. At a particular temperature the black body would emit the maximum amount of energy possible for that temperature. This value is known as the black body radiation. It would emit at every wavelength of light as it must be able to absorb every wavelength to be sure of absorbing all incoming radiation. |
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