Question

When a ray of light passes through a prism, the violet colour shows the maximum
deviation. ( give reason)​

Answer 1

Explanation:

Since the wavelength of violet light is the smallest, therefore maximum deviation will occur for violet light.

Answer 2

Explanation:

In vibgyor pattern red has maximum wavelength, so it cover maximum distance without deviation, but Violet has minimum wavelength, so it gets spread all over the atmosphere, so deviation is more.

And we can analyze it by Snell's law…

For Violet refrective index of glass is maximum so angle of deviation is more.

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