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How Does the Deviation Produced by a Triangular Prism Depend on the Colours (Or Wavelengths) of Light Incident on It? Which Colour Deviates the Most and Which the Least? - Physics

Short Note
How does the deviation produced by a triangular prism depend on the colours (or wavelengths) of light incident on it? Which colour deviates the most and which the least?
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Solution

Light of different colours have different speeds in a medium.
Therefore, the refractive index of glass (the material of prism) is different for different colours of light and the deviation caused by a prism is different for different colours of light.
Violet is deviated the most because in glass, speed of violet is least.
Red is deviated the least because in glass, speed of red is most.

Concept: Refraction of Light from a Plane Transparent Surface
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APPEARS IN

Frank ICSE Class 10 Physics Part 2
Chapter 2 Light
Exercise 2.3 | Q 4 | Page 109
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