11th Class Physics Physical World / भौतिक जगत Question Bank 11th CBSE Physics Mathematical Tools, Units & Dimensions

  • question_answer
    What is the advantage in choosing the wavelength of light radiation as a standard of length?

    Answer:

                    The fundamental unit of length, i.e., metre has been defined in terms of wavelength 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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