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Assertion: For a glass block, the i vs. r graph is a straight line. Reason: When a ray of light undergoes refraction, it follows Snell’s law.

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Question

Assertion: For a glass block, the i vs. r graph is a straight line.

Reason: When a ray of light undergoes refraction, it follows Snell’s law.

Options

  • Both Assertion and Reason are true, and the Reason is the correct explanation of the Assertion.

  • Both Assertion and Reason are true, but Reason is not the correct explanation of the Assertion.

  • Assertion is true, but the Reason is false.

  • Assertion is false, but the Reason is true.

MCQ
Assertion and Reasoning
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Solution

Assertion is false, but the Reason is true.

Explanation:

The assertion is false because a graph of the angle of incidence versus the angle of refraction is not a straight line. Snell’s law states that the ratio of the sines of these angles is constant, which means a graph of sin i against sin r is a straight line. The reason is true.
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Chapter 4: Refraction of Light - COMPETENCY-FOCUSED PRACTICE QUESTIONS RELEASED BY CISCE [Page 104]

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Goyal Brothers Prakashan A New Approach to ICSE Physics [English] Class 10
Chapter 4 Refraction of Light
COMPETENCY-FOCUSED PRACTICE QUESTIONS RELEASED BY CISCE | Q 4. | Page 104
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