NEW DELHI: Edufever, one of India’s trusted education platforms, has been releasing a comprehensive set of Physics questions focused on the high-weightage chapter. Today’s topic is Ray Optics and Optical Instruments.
Designed by subject matter experts and aligned with the NCERT curriculum, these questions aim to help students grasp complex optics concepts, boost accuracy, and develop exam confidence.
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“Ray Optics is a scoring chapter, but often misunderstood. Our curated sets combine clarity, complexity, and conceptual depth—exactly what NEET demands,” said the Edufever Academic Team.
What sets this release apart is the inclusion of application-based problems, advanced reasoning-based MCQs, and a blend of theory + practice formats, making it ideal for both school revision and NEET crash courses.
1. The focal length of a convex lens is 20 cm. What is its power?
a) +5 D
b) -5 D
c) +2 D
d) -2 D
2. An object is placed 10 cm in front of a concave mirror of a focal length of 20 cm. The image is:
a) Real and inverted
b) Virtual and erect
c) Real and erect
d) Virtual and inverted
3. The refractive index of glass is 1.5. What is the speed of light in glass? (c = 3 × 10⁸ m/s)
a) 2 × 10⁸ m/s
b) 3 × 10⁸ m/s
c) 4.5 × 10⁸ m/s
d) 1.5 × 10⁸ m/s
4. A concave mirror forms a real image when the object is placed:
a) Between pole and focus
b) At the pole
c) Beyond the center of curvature
d) Anywhere
5. Which mirror is used in solar furnaces?
a) Convex
b) Concave
c) Plane
d) Spherical
6. In a compound microscope, the magnification is the product of:
a) Only objective magnification
b) Only eyepiece magnification
c) Objective and eyepiece magnification
d) None of these
7. The critical angle for a medium is defined when light moves from:
a) Denser to rarer medium
b) Rarer to denser medium
c) Vacuum to medium
d) Medium to vacuum
8. The mirror used by a dentist is:
a) Convex
b) Concave
c) Plane
d) None
9. In a convex lens, if the object is at 2F, the image is formed at:
a) F
b) 2F on the other side
c) Infinity
d) Between F and 2F
10. Which of the following has the least refractive index?
a) Water
b) Glass
c) Diamond
d) Air
11. The image formed by a concave mirror for an object placed between pole and focus is:
a) Virtual and enlarged
b) Real and enlarged
c) Virtual and diminished
d) Real and diminished
12. Which instrument uses two convex lenses?
a) Telescope
b) Microscope
c) Camera
d) Both a and b
13. The ability of a lens to converge or diverge light is called:
a) Magnification
b) Power
c) Focal length
d) Refractive index
14. What is the angular magnification of a simple microscope?
a) D/f
b) f/D
c) D+f
d) D-f
15. Which of these is not an optical instrument?
a) Periscope
b) Microscope
c) Telescope
d) Thermometer
16. A prism causes deviation due to:
a) Reflection
b) Absorption
c) Refraction
d) Dispersion
17. What is the nature of the image formed by a convex mirror?
a) Real, diminished
b) Virtual, erect
c) Real, inverted
d) Virtual, inverted
18. The focal length of a concave mirror is 30 cm. Its radius of curvature is:
a) 60 cm
b) 30 cm
c) 15 cm
d) 90 cm
19. Which type of lens is used to correct hypermetropia?
a) Concave
b) Convex
c) Cylindrical
d) Plano-concave
20. A plano-convex lens (refractive index μ = 1.5) with radius of curvature R is placed with its plane side on a glass slab (μ = 1.5). A parallel beam of light falls on the convex side. What will be the effective focal length of the system?
a) R
b) R/2
c) ∞
d) 2R
21. A thick convex lens behaves like a diverging lens in air. This is possible when:
a) Its radii of curvature are equal
b) The lens is made of glass
c) The lens is hollow and filled with water
d) The lens is placed in a medium of higher refractive index than itself
22. Two convex lenses of focal lengths f₁ = 20 cm and f₂ = 30 cm are placed coaxially and in contact. An object is placed at a distance of 10 cm from the system. What is the final image position from the second lens?
a) 60 cm
b) 30 cm
c) 12 cm
d) 10 cm
23. A ray of light is incident at an angle θ on the face of a prism (angle A = 60°) and emerges perpendicular to the second face. If the refractive index of the prism is √3, what is the angle of incidence θ?
a) 30°
b) 45°
c) 60°
d) 90°
24. A convex lens produces a real image equal to the object size when the object is placed at a distance x from the lens. The focal length of the lens is:
a) x/4
b) x/2
c) x
d) 2x
25. Assertion (A): A convex mirror always forms a virtual, erect, and diminished image of the object.
Reason (R): A convex mirror has a negative focal length and diverges the incident parallel rays.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, but R is not the correct explanation of A.
c) A is true, but R is false.
d) A is false, but R is true.
Answer Keys: 1. a 2. b 3. a 4. c 5. b 6. c 7. a 8. b 9. b 10. d 11. a 12. d 13. b 14. a 15. d 16. c 17. b 18. a 19. b 20. c
21. d 22. a 23. a 24. b 25. a
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Students can access the free PDF worksheets, interactive quizzes, and print-ready formats via www.edufever.com and stay tuned for more releases across Physics, Chemistry, and Biology in the coming weeks.
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