NeetVictoryQuestion 1: Lens Formula and Magnification
The power of a concave lens of focal length 25 cm is:
- A +0.25 D
- B −0.04 D
- C +4 D
- D −4 D
Answer: D. −4 D
Why: P = 1/f = 1/(−0.25) = −4 D.
NEET Physics: Ray Optics and Optical Instruments. Chapter-wise Practice Questions and Test
Ray Optics and Optical Instruments is a Class 12 Physics chapter that carries about 5.3% of the Physics questions in NEET. Practise it with 50 questions covering 2 topics, each with an explanation.
Practise Ray Optics and Optical Instruments
Open in the appSets of 15 questions that adapt to your level, with an explanation for every answer.
Topics covered in Ray Optics and Optical Instruments
- Lens Formula and Magnification (24 questions)
- Reflection and Refraction (26 questions)
How often Ray Optics and Optical Instruments has come up in NEET
Across the 13 previous year papers, Ray Optics and Optical Instruments had 34 questions, about 2.6 a year. The most in one paper was 4, in NEET 2021.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 2 |
| NEET 2025 | 2 |
| NEET 2024 | 2 |
| NEET 2023 | 3 |
| NEET 2022 | 3 |
| NEET 2021 | 4 |
| NEET 2020 | 3 |
| NEET 2019 | 3 |
| NEET 2018 | 3 |
| NEET 2017 | 2 |
| NEET 2016 | 3 |
| Re-AIPMT 2015 | 2 |
| AIPMT 2014 | 2 |
Sample questions on Ray Optics and Optical Instruments with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 2: Reflection and Refraction
The Sun appears red at sunrise and sunset because:
- A the Sun cools at those times
- B the light travels a longer path through the atmosphere, so most of the blue is scattered away
- C red light is emitted more at those times
- D the atmosphere absorbs green only
Answer: B. the light travels a longer path through the atmosphere, so most of the blue is scattered away
Why: The remaining light reaching the eye is richer in longer wavelengths.
Question 3: Lens Formula and Magnification
A compound microscope has an objective of magnification 20 and an eyepiece of magnification 10. Its total magnification is:
- A 10
- B 30
- C 200
- D 2
Answer: C. 200
Why: The total magnification is the product, 20 × 10 = 200.
Question 4: Reflection and Refraction
A concave mirror has a focal length of 15 cm. An object placed 30 cm from it forms an image at:
- A 15 cm behind the mirror
- B 30 cm in front of the mirror
- C at infinity
- D 10 cm in front of the mirror
Answer: B. 30 cm in front of the mirror
Why: The object is at the centre of curvature (R = 2f = 30 cm), so the image forms there, real, inverted and the same size.
Question 5: Lens Formula and Magnification
A hypermetropic person has a near point at 50 cm. To read at 25 cm, the lens needed has a power of:
- A +2 D
- B −2 D
- C +4 D
- D +0.5 D
Answer: A. +2 D
Why: The lens must form a virtual image at 50 cm for an object at 25 cm: 1/f = 1/25 − 1/50 = 1/50 cm⁻¹, so f = +50 cm, P = +2 D.
Question 6: Reflection and Refraction
Light travelling in air strikes a glass surface (n = √3) at an angle of incidence of 60°. The angle of refraction is:
- A 45°
- B 60°
- C 30°
- D 90°
Answer: C. 30°
Why: sin r = sin60°/√3 = (√3/2)/√3 = 1/2, so r = 30°.
Question 7: Lens Formula and Magnification
A convex lens of focal length 10 cm has an object placed 30 cm from it. The image is formed at:
- A 7.5 cm on the same side
- B 15 cm on the same side
- C 30 cm on the other side
- D 15 cm on the other side of the lens
Answer: D. 15 cm on the other side of the lens
Why: 1/v = 1/f + 1/u = 1/10 − 1/30 = 1/15, so v = 15 cm (real, inverted and diminished).
Question 8: Reflection and Refraction
When an object is placed at the principal focus of a concave mirror, the image is formed:
- A at infinity
- B behind the mirror
- C at the pole
- D at the centre of curvature
Answer: A. at infinity
Why: Rays from the focus become parallel after reflection.
Practise all of Ray Optics and Optical Instruments
Open in the appFrequently asked questions
How many questions come from Ray Optics and Optical Instruments in NEET?
Ray Optics and Optical Instruments carries about 5.3% of the Physics questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 34 times, about 2.6 questions a year.
Which class is Ray Optics and Optical Instruments from?
Ray Optics and Optical Instruments is a Class 12 Physics chapter in the NCERT syllabus.
Where can I practise Ray Optics and Optical Instruments questions for NEET?
NeetVictory has 50 practice questions on Ray Optics and Optical Instruments, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.