Light – Reflection & Refraction: Class 10 Previous Year Questions

Light – Reflection & Refraction questions asked in CBSE board exams

Repeated questions first. Open the free app to see each question as it appeared in the paper, with its marking scheme.

1. An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. Use lens formula to find the position of the image formed in this case.
   Board 20252 marksshort answerRepeated: 2024,2025
2. An object is placed at a distance of 30 cm from the pole of a concave mirror. If its real and inverted image is formed at 60 cm in front of the mirror, the focal length of the mirror is : (A) – 15 cm (B) – 20 cm (C) + 20 cm (D) + 15 cm
   Board 20251 markMCQRepeated: 2024,2025
3. An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position of the image formed by the mirror.
   Board 20242 marksshort answerRepeated: 2024,2025
4. A convex lens of focal length 15 cm, is forming a real image. If the size of image is same as the size of object, then position of object and position of image will be, respectively : (A) - 15 cm and - 15 cm from lens (B) - 15 cm and + 15 cm from lens (C) - 30…
   Board 20263 marksshort answer
5. When you look at an object very close to your eyes, the : (A) Ciliary muscles of your eye contract and the eye lens becomes thick. (B) Ciliary muscles of your eye get relaxed and the eye lens becomes thick. (C) Ciliary muscles of your eye contract and the eye …
   Board 20263 marksAssertion-Reason
6. (a) Write the expression for the magnification produced by a lens in terms of object distance and image distance. (b) A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm. Calculate the size of the image forme…
   Board 20265 markslong answer
7. The given figure shows image formation by a lens. Analyse the figure and answer the following questions : Lens (a) What is the type of lens used for image formation in the given ray diagram ? (b) If the real image is formed at a distance of 30 cm from the lens…
   Board 20263 marksshort answer
8. Attempt either (a) or (b) : (a) How does the focal length of eye lens change as the distance of the object from the eyes is altered ? Explain. 2 OR (b) Why is the concave lens used as a corrective lens for a myopic eye ?
   Board 20265 markslong answer
9. With the help of the given ray diagram, calculate the refractive index of Medium 2 with respect to Medium 1. 2 (Given that 3 = 1·732)
   Board 20263 marksshort answer
10. Read the following passage and answer the questions given : Lenses can form different types of images depending upon their focal virtual, erect images, while a concave lens forms only virtual and diminished images. The focal length determines the power of lens…
    Board 20264 markscase-based
11. From the following options choose the one which gives negative magnification greater than one : 1 (A) Concave mirror; Nature of image – real (B) Concave mirror; Nature of image – virtual (C) Convex mirror; Nature of image – real (D) Convex mirror; Nature of im…
    Board 20263 marksshort answer
12. (a) (i) The power of a lens ‘X’ is – 2·5 D. Name the lens and determine its focal length in cm. For which eye defect of vision will an optician prescribe this type of lens as a corrective lens ? (ii) ‘‘The value of magnification ‘m’ for a lens is – 2.’’ Using …
    Board 20255 markslong answer
13. A convex lens forms an 80 cm long image of a 20 cm long object which is kept at a distance of 60 cm from the optical centre of the lens. If the object and the image are on the same side of the lens, find (i) the nature of the image, (ii) the position of the…
    Board 20253 marksshort answer
14. Draw ray diagrams to show the nature, position and relative size of the image formed by a convex mirror when the object is placed (i) at infinity and (ii) between infinity and pole P of the mirror.
    Board 20253 marksshort answer
15. If the absolute refractive indices of two media X and Y are 6 5 and 4 3 respectively, then the refractive index of Y with respect to X will be : (A) 10 9 (B) 9 10 (C) 9 8 (D) 8
    Board 20251 markMCQ
16. (a) Out of the two lenses, one concave and the other convex, state which one will diverge a parallel beam of light falling on it. Draw a ray diagram to show the principal focus of the lens. 2 OR (b) A ray of light after refraction from a convex lens emerges pa…
    Board 20252 marksshort answer
17. Mirror ‘X’ is used to concentrate sunlight in solar furnace and Mirror ‘Y’ is fitted on the side of the vehicle to see the traffic behind the driver. Which of the following statements are true for the two mirrors ? (i) The image formed by mirror ‘X’ is real, d…
    Board 20251 markMCQ
18. An old person is suffering from an eye defect caused by weakening of ciliary muscles and diminishing flexibility of the eye lens. If the defect of vision is ‘a’ which can be corrected by lens ‘b’, then ‘a’ and ‘b’ respectively are : (A) hypermetropia and conve…
    Board 20251 markMCQ
19. At what distance from a convex lens should an object be placed to get an image of the same size as that of the object on a screen ? (a) Beyond twice the focal length of the lens. (b) At the principal focus of the lens. (c) At twice the focal length of the lens…
    Board 20241 markMCQ
20. Study the data given below showing the focal length of three concave mirrors A, B and C and the respective distances of objects placed in front of the mirrors : Case Mirror Focal Length (cm) Object Distance (cm) 20 45 15 30 30 20 (i) In which one of the above …
    Board 20244 markscase-based

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