alleryWhich colour travels fastest in a glass prism?
ABlue
BGrey
CPink
DRed
Answer & Solution
Correct answer: D. Red
1. The bending of red is least while that of violet is most.
2. Equivalently, red light travels faster than violet light in a glass prism.
3. So the correct answer is red.
_Source: syllabus Physics Part II, Ch 9 'Ray Optics and Optical Instruments'_
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