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When a light ray travels from a rarer medium into a denser medium, how does it bend at the boundary?
AIt travels along the surface
BIt does not bend at all
CIt bends away from the normal
DIt bends towards the normal
Answer & Solution
Correct answer: D. It bends towards the normal
1. A denser medium has a higher refractive index, so light slows down on entering it.
2. The chapter states: when a light ray passes from a rarer medium to a denser medium, it bends towards the normal.
3. Bending away from the normal happens in the opposite case (denser to rarer), so that distractor is ruled out.
4. Therefore the ray bends towards the normal.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 6 "Refraction of Light", p.84_
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