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What is the advantage in choosing the wa...

What is the advantage in choosing the wavelength of light readination as a standard of length?

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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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PRADEEP-PHYSICAL WORLD AND MEASUREMENT-Conceptual Problem
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  2. In difining the standerd of length, we have to specify the temperature...

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  3. What is the advantage in choosing the wavelength of light readination ...

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  4. Which type of phenomenon can be used as a measure of time ? Given thre...

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  9. What is the difference between nm, mN, Nm ?

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