Radiation energy is emitted by all the substances, which are above____________________?
Correct answer: B. 0°K
- A. 0°C
- B. 0°K
- C. 100°C
- D. Room temperature
Explanation
Thermal radiation is emitted by matter at every temperature above absolute zero, although the intensity increases strongly with temperature. Thus 0 K is the limiting point at which emission ceases.
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