A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge:
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Question

A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge:

G1 Physics · Accepted Answer

Step 1: Red and green have different refractive indices in the glass, so they bend by different angles inside. Step 2: The two interfaces are parallel. Each colour emerges parallel to its own incident ray. Step 3: The two colours may have different lateral displacements and therefore emerge as separated, parallel rays. Final answer: (B).