Class 10 Science — Chapter 9: Light — Reflection and Refraction
68 practice questions · 23 Easy · 23 Medium · 22 Hard
Practise Class 10 Science Chapter 9, "Light — Reflection and Refraction", with 68 NCERT-aligned multiple-choice questions. The set is split into 23 Easy, 23 Medium and 22 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and the JEE & NEET foundation years.
"Light — Reflection and Refraction" is one of the chapters where concept clarity across physics, chemistry and biology basics really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Light — Reflection and Refraction, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 10 Science mastery score. A few sample questions are shown below; sign in free to practise all 68.
Key concepts: Light — Reflection and Refraction (Class 10 Science)
Light reflects off mirrors and bends (refracts) through lenses. This chapter gives the rules and formulas for image formation by spherical mirrors and lenses.
- Reflection by spherical mirrors
- Concave and convex mirrors; key terms — pole, centre of curvature, focus, focal length (f = R/2).
- New Cartesian sign convention
- Distances are measured from the pole; those measured against the incident light are negative. Apply it before substituting into formulas.
- Refraction of light
- Light bends when it changes medium because its speed changes. The refractive index compares the speed of light in two media.
- Lenses
- Convex (converging) and concave (diverging) lenses form images depending on object position; power measures converging/diverging ability.
- Magnification
- The ratio of image height to object height, also related to image and object distances.
Key formulas — Light — Reflection and Refraction
💡 Exam tips for Light — Reflection and Refraction
- Follow the sign convention strictly — most numerical errors come from wrong signs of u, v and f.
- A positive power/focal length means a convex lens; negative means a concave lens.
Sample questions
The image formed by a plane mirror is:
A plane mirror always produces a virtual, erect image of the same size, behind the mirror.
The mirror formula relates u, v, f as:
For mirrors: 1/v + 1/u = 1/f (u and v measured with sign convention).
Refractive index of glass with respect to air is 1.5. The speed of light in glass is approximately:
v = c / n = (3 × 10⁸) / 1.5 = 2 × 10⁸ m/s.
Light — Reflection and Refraction — FAQs
What are the key concepts in Class 10 Science Light — Reflection and Refraction?+
Light reflects off mirrors and bends (refracts) through lenses. This chapter gives the rules and formulas for image formation by spherical mirrors and lenses. Key ideas include Reflection by spherical mirrors, New Cartesian sign convention, Refraction of light, Lenses, Magnification.
What does Class 10 Science Chapter 9 (Light — Reflection and Refraction) cover on XamBaaz?+
It covers 68 NCERT-aligned MCQs on "Light — Reflection and Refraction" — 23 Easy, 23 Medium and 22 Hard — each with a timed quiz and an instant explanation, suitable 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 (limited-time launch price), with no per-chapter charges.
How should I revise "Light — Reflection and Refraction" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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