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General Studies (Paper 1) from JKPSC JKAS 2023 Prelims
Subject: General Studies (Paper 1) General Science Jammu & Kashmir Public Service Commission Last updated May 9, 2026
JKPSC Prelims 2023 General Studies (Paper 1)

Consider the following statements about light refraction:

1. When light passes from a rarer medium to a denser medium, it slows down and bends towards the normal.
2. When light passes from a denser medium to a rarer medium, it speeds up and bends away from the normal.

The correct statement/s is/are

Answer & Explanation

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Correct Answer: Option C — Both
Both statements accurately describe the fundamental laws of refraction. The direction in which light bends is determined by the change in its speed as it moves between materials of different optical densities.

Detailed Explanation
Statement 1 (Rarer to Denser): When light moves from a medium like air (rarer) into glass or water (denser), the particles of the medium "slow down" the light wave. Because one side of the light wave hits the denser boundary first, it pivots, causing the beam to bend towards the normal (an imaginary line perpendicular to the surface).

Statement 2 (Denser to Rarer): Conversely, when light exits a dense medium (like glass) and enters a rarer one (like air), it "speeds up." This causes the beam to push further out, bending away from the normal.
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.

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JKPSC JKAS 2023 Prelims

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Exam JKPSC
Recruitment JKAS
Stage Prelims
Year 2023
Subject General Studies (Paper 1)
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