alleryWhich colour of light deviates LEAST when white light passes through a glass prism?
AViolet (highest n)
BRed (lowest n → least deviation)
CGreen
DAll deviate equally
Answer & Solution
Correct answer: B. Red (lowest n → least deviation)
**Red light has the smallest refractive index** in normal media
→ smallest deviation through a prism.
**Order of deviation:** **R(min) < O < Y < G < B < I < V(max)**.
**Memory aid:** 'VIBGYOR' is the order of *increasing deviation*.
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