CBSE Class 12-science Answered
Find the wavelength of electromagnetic waves of frequency 6 × 1012 Hz in free space. Give its two applications.
Asked by Topperlearning User | 19 May, 2014, 04:37: PM
Expert Answer
These are infrared rays which are used :
i. in revealing the secret writing on the ancient walls.
ii. in green houses to keep the plants warm.
Answered by | 19 May, 2014, 06:37: PM
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