1.

(i) Why is the ratio of the velocities of light of wavelengths 4000Å and 8000Å in vacuum 1 : 1 ?(ii) Which of the above wavelengths has a higher frequency ?

Answer»

(i) In vaccume light or any electromagnetic wave velocity is always constant 3 × 108 m/s and it does not depend on wavelength or frequency.

(ii) As we know v  n, where v = velocity and „n‟ is frequency, therefore frequency is inversely proportional to wavelength. therefore wavelength of 4000Å will have more frequency.



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