(g) Why Newton's rings are circular
(h) What is dispersive power?
(i) What is population inversion?
(j) What is dispersion?
give the answer of question no.(h)
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ankita8726:
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The power of a transparent medium to separate different colours of light by refraction as measured by the difference in refractivity for two specified widely differing wavelenghts divided by the refractivity at some specified intermediate wavelength
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