The range of electromagnetic spectrum important in heat transfer by radiation is ______________ microns?
Correct answer: A. 0.5-50
- A. 0.5-50
- B. 0.38-0.78
- C. 100-1000
- D. 5-50
Explanation
Most thermal radiation of engineering interest lies roughly in the infrared range, extending approximately from 0.5 to 50 micrometres. The 0.38-0.78 micrometre range is mainly visible light, not the broader heat-transfer radiation band.
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