Light — Reflection and Refraction — Class 10 MCQs with Answers
Class 10 CBSE Science (Physics) · Chapter 9
115 practice questions · 33 Easy · 42 Medium · 40 Hard · Updated
Jump to the 6 solved questions
Practise the most important Class 10 CBSE Science (Physics) questions from Chapter 9, "Light — Reflection and Refraction". You get 11 timed quizzes made from 115 NCERT-based MCQs, with answers and explanations. The questions are split into 33 Easy, 42 Medium and 40 Hard. Warm up on the basics, then move on to the exam-level questions that top scorers in CBSE Board exams and the JEE & NEET foundation years get right.
To score well in "Light — Reflection and Refraction", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This helps you stay accurate when time is short, just as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Light — Reflection and Refraction, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 10 Science (Physics) mastery score. Try the 6 sample questions below: tap an option to see the answer and a worked explanation. Sign in free to start practising.
Light — Reflection and Refraction — important questions & MCQs with answers (Class 10 Science (Physics))
6 solved questions from this chapter's difficulty levels, each with its answer and explanation. Tap an option to check yourself.
0 of 6 answered
- Q1 of 6Easy
The image formed by a plane mirror is:
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Answer: Virtual and erect
Explanation: Reflected rays from a plane mirror only appear to meet behind it, so the image is virtual and erect, same size as the object — never real or inverted, unlike a curved mirror.
- Q2 of 6Easy
A convex lens is also called:
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Answer: Converging lens
Explanation: A convex lens converges parallel rays to a focal point — converging lens.
- Q3 of 6Medium
Snell's law of refraction states:
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Answer: n₁ sin i = n₂ sin r
Explanation: Snell's law states n₁ sin i = n₂ sin r, linking each medium's refractive index to the angle from the normal — not the mirror rule i = r, which applies only to reflection.
- Q4 of 6Medium
Assertion (A): Convex mirrors are commonly used as rear-view mirrors in vehicles. Reason (R): A convex mirror always gives an erect, though diminished, image and has a wider field of view.
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Answer: Both A and R are true and R is the correct explanation of A
Explanation: Both are true. The chapter says convex mirrors are preferred as rear-view mirrors because they always give an erect image and show a much larger area.
- Q5 of 6Hard
A concave mirror of f = 15 cm forms an image of an object placed 10 cm in front. Image distance v:
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Answer: +30 cm
Explanation: 1/v = 1/f − 1/u = 1/(−15) − 1/(−10) = −2/30 + 3/30 = 1/30 ⇒ v = +30 cm (virtual).
- Q6 of 6Hard
Assertion (A): A lens of power −2.5 D is a convex lens of focal length 40 cm. Reason (R): The power of a concave lens is negative.
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Answer: A is false but R is true
Explanation: A is false: f = 1/P = 1/(−2.5 D) = −0.40 m, so it is a concave lens of focal length 40 cm. R is true.
Light — Reflection and Refraction notes: key concepts (Class 10 Science (Physics))
Light travels in straight lines, bounces off mirrors and bends when it enters a new medium. This chapter establishes the laws of reflection and refraction, and uses the mirror and lens formulas with a strict sign convention to locate and describe images.
- Laws of reflection
- The angle of incidence equals the angle of reflection, and the incident ray, reflected ray and normal all lie in one plane.
- Plane mirror image
- Always virtual, erect, the same size as the object, as far behind the mirror as the object is in front, and laterally inverted.
- Concave and convex mirrors
- A concave mirror curves inward and can converge light; a convex mirror curves outward and always diverges it.
- Centre of curvature and focus
- The centre of curvature is the centre of the sphere the mirror is part of; the principal focus lies midway between it and the pole.
- Image formation by mirrors
- Image position and nature depend on where the object lies relative to F and C, traced using standard rays.
- Uses of curved mirrors
- Concave mirrors in headlights, shaving mirrors and dentists' mirrors; convex mirrors as rear-view mirrors for their wide field of view.
- Refraction of light
- The bending of light as it passes from one transparent medium into another, caused by a change in its speed.
- Laws of refraction and Snell's law
- The incident ray, refracted ray and normal lie in one plane, and the ratio of the sines of the angles is a constant for the pair of media.
- Refractive index
- A measure of how much a medium slows light, given by the speed of light in vacuum divided by its speed in the medium.
- Convex and concave lenses
- A convex lens is thicker at the centre and converges light; a concave lens is thinner at the centre and diverges it.
- Image formation by lenses
- Traced with standard rays; a convex lens gives real inverted images except when the object is inside the focus, where the image is virtual and enlarged.
- Sign convention
- Distances are measured from the pole or optical centre, positive along the direction of incident light and negative against it.
- Magnification
- The ratio of image height to object height, whose sign indicates whether the image is erect or inverted.
- Power of a lens
- The reciprocal of the focal length in metres, measured in dioptres; positive for convex and negative for concave lenses.
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Light — Reflection and Refraction — FAQs
What are the key concepts in Class 10 Science (Physics) Light — Reflection and Refraction?+
Light travels in straight lines, bounces off mirrors and bends when it enters a new medium. This chapter establishes the laws of reflection and refraction, and uses the mirror and lens formulas with a strict sign convention to locate and describe images. Key ideas include Laws of reflection, Plane mirror image, Concave and convex mirrors, Centre of curvature and focus, Image formation by mirrors, Uses of curved mirrors.
What does Class 10 Science (Physics) Chapter 9 (Light — Reflection and Refraction) cover on XamBaaz?+
It has 115 NCERT-based MCQs on "Light — Reflection and Refraction": 33 Easy, 42 Medium and 40 Hard. Together they make 11 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams and the JEE & NEET foundation years.
Are these "Light — Reflection and Refraction" questions free to practise?+
Yes. Sign in with Google to practise "Light — Reflection and Refraction" free. Full unlimited access is ₹999/year. One year from the day you pay. You stay in Class 10 till 31 March; on 1 April your account moves up to Class 11 and the rest of your year carries over. No chapter is charged separately.
How should I revise "Light — Reflection and Refraction" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 11 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Light — Reflection and Refraction" MCQs available with answers?+
Yes. 6 sample questions are on this page with answers: tap an option, or "Show answer", to see the correct option and a step-by-step explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Light — Reflection and Refraction" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Light — Reflection and Refraction (Class 10 Science (Physics))?+
The questions that matter most test Laws of reflection, Plane mirror image, Concave and convex mirrors, Centre of curvature and focus, Image formation by mirrors, Uses of curved mirrors. This page shows 6 solved important MCQs with answers and explanations. Sign in to practise all 115 questions on the chapter as timed quizzes.
Is there an online quiz for Light — Reflection and Refraction?+
Yes — Class 10 Science (Physics) Light — Reflection and Refraction has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.
Are there question answers and extra questions for Light — Reflection and Refraction (Class 10 Science (Physics))?+
Yes. This page has 6 solved questions on Light — Reflection and Refraction, each with the correct answer and a short explanation. Sign in to practise all 115 questions on the chapter as timed quizzes.
Are there assertion–reason and case study questions for Light — Reflection and Refraction (Class 10 Science (Physics))?+
Yes. The Light — Reflection and Refraction question bank has 9 assertion–reason questions and 12 case-based (case study) questions in the CBSE board format, alongside the regular MCQs. Each comes with the answer and a worked explanation. Sign in to practise them in timed quizzes.