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Traced the Correct Path - Science

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Study the following diagrams in which the path of a ray of light passing through a glass prism as traced by four students P, Q, R and S is shown:

The student who has traced the path correctly is

(A) P

(B) Q

(C) R

(D) S

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Solution

Student Q has traced the path correctly.

When light is travelling from a rarer medium to a denser medium, it bends towards the normal to the surface, while the light from a denser medium to a rarer medium bends away from the normal to the surface.

Hence, the correct option is B.

Concept: Dispersion of Light Through Prism and Formation of Spectrum
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