What is the advantage in choosing the wavelength of light readination – InterviewSolution

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1.	What is the advantage in choosing the wavelength of light readination as a standard of length?
Answer» The fundamental unit of length, i.e., metre has been defined in terms of wavelengths because : (i) wavelength is accurately defined, (ii) it is not affected by changes in place, time and physical conditions like temperature, (iii) it is easily reproducible in any good laboratory.

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