PU M 2026 Geometrical Optics Free Quiz 1

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PU M 2026 Geometrical Optics Free Quiz 1

PU M Quiz

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General 10 MCQs

1. What is reflection?

A. Bouncing of light from a surface B. Bending of light at a boundary C. Spreading of light around obstacles D. Restriction of light vibrations

2. What is the law of reflection?

A. i > r B. i = r C. i < r D. i + r = 90°

3. What type of image is formed by a plane mirror?

A. Real and inverted image B. Real and upright image C. Virtual and upright image D. Virtual and inverted image

4. What type of images can a concave mirror form?

A. Only real images B. Only virtual images C. Only upright images D. Both real and virtual images

5. What type of image is formed by a convex mirror?

A. Virtual, upright, diminished B. Virtual, upright, magnified C. Real, inverted, diminished D. Real, inverted, magnified

6. What is the relationship between focal length and radius of curvature for a spherical mirror?

A. f = 2R B. f = R/2 C. f = R D. f = R²

7. What is Snell's law?

A. n₁ sin θ₁ = n₂ cos θ₂ B. n₁ sin θ₁ = n₂ sin θ₂ C. n₁ cos θ₁ = n₂ cos θ₂ D. n₁ sin θ₁ = n₂ tan θ₂

8. What is the definition of refractive index?

A. n = v/c B. n = c/v² C. n = c/v D. n = v²/c

9. When light enters a denser medium from a rarer medium, how does it bend?

A. Away from the normal B. Not bent C. Along the normal D. Toward the normal

10. What is the refractive index of water?

A. 1.33 B. 1.5 C. 2.4 D. 1.0

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