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Physics - Ray Optics

Practise 31 BITSAT previous year questions on Ray Optics, compiled from papers spanning 2009 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Ray Optics has been asked in 16 of the 16 years of BITSAT papers analysed (2009–2024), with 31 questions in all. 42% of them were easy, 39% moderate and 19% tough. Most of its questions came from 2024, with 4 questions that year. In the last three years (2022–2024) it had 8 questions across 6 papers, about 1.3 per paper.

The chapter's 8 topics are not weighted equally: Lens Formula, Refraction of light from curved surface (9 questions, 29%), Optical Instruments (6 questions, 19%), and Refraction of light from plane surface (5 questions, 16%) have been asked the most. Over the last five years the most frequent topics have been Optical Instruments (3), Combination of Lens and Mirrors (1), and Critical angle and total internal reflection (1). Combination of Lens and Mirrors has produced the most tough questions (2).

  1. 1If the distance between object and its two times magnified virtual image produced by a curved mirror is 15 cm , the focal length of the mirr2024 (Memory Based Paper 1)Mirror Formula, Reflection in Spherical Mirror
  2. 2In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm . The focal length of the objective,2024 (Memory Based Paper 2)Optical Instruments
  3. 3Power of biconvex lens is diopter. When it is cut into two symmetrical halves by a plane containing the principal axis. The ratio of power o2024 (Memory Based Paper 3)Lens Formula, Refraction of light from curved surface
  4. 4The magnifying power of a telescope is 9 . When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm .2024 (Memory Based Paper 3)Optical Instruments
  5. 5In a reflecting telescope, a secondary mirror is used to:2023 (Memory Based Paper 1)Optical Instruments
  6. 6A thin prism with an angle and made of glass of refractive index 1.54 is combined with another prism made from glass of refractive index 1.72023 (Memory Based Paper 2)Prism and Dispersion of Light
  7. 7A mosquito is sitting infront of a glass rod having spherical end of radius of curvature . The image would be formed at2022Reflection of Light from Plane Mirror
  8. 8An achromatic convergent doublet of two lense in contact has a power of . The power of converging lens is . The ratio of the dispersive powe2022Combination of Lens and Mirrors
  9. 9Green light of wavelength is incident on an airglass interface. If the refractive index of glass is , the wavelength of light in glass would2021Critical angle and total internal reflection
  10. 10A vessel of depth is half filled with a liquid of refractive index and the upper half with a liquid of refractive index . The apparent depth2020Refraction of light from plane surface
  11. 11A convex lens of focal length 25 cm produces images of the same magnification 2 , when an object is kept at two positions x 1 and x 2 x 1 x 2019Lens Formula, Refraction of light from curved surface
  12. 12In the shown situation, if middle portion of the lens is painted black, then2019Lens Formula, Refraction of light from curved surface
  13. 13A convex lens shown in the figure is made up of two types of transparent materials. A point sources of light is placed on its principal axis2018Lens Formula, Refraction of light from curved surface
  14. 14A planoconvex lens has thickness of 4 cm . When placed on a horizontal table, with the curved surface in contact with it, the apparent depth2018Lens Formula, Refraction of light from curved surface
  15. 15The focal length of a thin convex lens for red and blue rays are 100 cm and 96 . 8 cm respectively. Then, the dispersive power of the materi2017Prism and Dispersion of Light
  16. 16A plano-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lenses are made of different2017Combination of Lens and Mirrors
  17. 17A biconvex lens has a radius of curvature of magnitude . Which one of the following options best describe the image formed of an object of h2016Lens Formula, Refraction of light from curved surface
  18. 18A ray of light of intensity I is incident on a parallel glass slab at point as shown in diagram. It undergoes partial reflection and refract2016Refraction of light from plane surface
  19. 19For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material whose refractive ind2016Prism and Dispersion of Light
  20. 20A lens having focal length and aperture of diameter forms an image of intensity . Aperture of diameter in central region of lens is covered 2016Lens Formula, Refraction of light from curved surface
  21. 21A ray parallel to principal axis is incident at from normal on concave mirror having radius of curvature . The point on principal axis where2015Mirror Formula, Reflection in Spherical Mirror
  22. 22A planoconvex lens fits exactly into a planoconcave lens. Their plane surface are parallel to each other. If the lenses are made of differen2015Combination of Lens and Mirrors
  23. 23Resolving power of the telescope will be more, if the diameter of the objective is2014Optical Instruments
  24. 24The magnifying power of a telescope is When it is adjusted for parallel rays, the distance between the objective and the eye piece is found 2014Optical Instruments
  25. 25When light is refracted, which of the following does not change ?2013Refraction of light from plane surface
  26. 26The given lens is broken into four parts and rearranged as shown. If the initial focal length is then after rearrangement the equivalent foc2013Lens Formula, Refraction of light from curved surface
  27. 27A ray of light is incident at the glass-water interface at an angle i, it emerges finally parallel to the surface of water, then the value o2012Refraction of light from plane surface
  28. 28A thin convergent glass lens has a power of . When this lens is immersed in a liquid of refractive index it acts as a divergent lens of foca2011Lens Formula, Refraction of light from curved surface
  29. 29A vessel of depth . is halffilled with a liquid of refractive index and the upper half with a liquid of refractive index The apparent depth 2011Refraction of light from plane surface
  30. 30The diameter of the objective of a telescope is a, its magnifying power is and wavelength of light is The resolving power of the telescope i2010Optical Instruments
  31. 31A plano-convex lens of focal length has its plane surface silvered An object is placed from the lens on the convex side. The distance of the2009Combination of Lens and Mirrors

Frequently Asked Questions

1.How many questions are available for Ray Optics?

This chapter includes 31 questions compiled from BITSAT papers spanning 2009 to 2024.

2.Are these questions only from BITSAT, or from other exams too?

These are BITSAT questions specifically for the Ray Optics chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Ray Optics an important chapter for BITSAT Physics?

Ray Optics has appeared in 16 of the 16 years of BITSAT papers covered here, with 31 questions across 19 papers - about 2 per paper it appears in.

4.What is the difficulty level of Ray Optics questions in BITSAT?

Of the 31 questions analysed for this chapter, 42% are easy, 39% moderate and 19% tough. 2024 had the most, with 4 questions.

5.Which topics in Ray Optics should I focus on?

These topics have carried the most weightage in Ray Optics:

  • Lens Formula, Refraction of light from curved surface - 9 questions (29%)
  • Optical Instruments - 6 questions (19%)
  • Refraction of light from plane surface - 5 questions (16%)
  • Combination of Lens and Mirrors has produced the most tough questions (2).
6.Is Ray Optics's weightage in BITSAT going up or down?

Across all 19 papers analysed, Ray Optics has averaged about 1.6 questions per paper. In the last three years (2022–2024), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.