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Q.

Is it true that refractive index and wavelength are directly proportional to each other?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false. The Refractive index of material and wavelength of color are inversely proportional to each other. For example, the wavelength of the color red is the longest, so the refractive index of the same will be the smallest. Similarly, violet has the greatest refractive index and the shortest wavelength.
The correct statement would be law of refraction the speed with which light propagates through a dielectric medium is inversely proportional to the refractive index of the medium.Question Image 
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