10. Light Reflection and Refraction

Description:

This downloadable PDF provides Class 10 Science Chapter 10 – Light: Reflection and Refraction Important Questions, tailored to the latest CBSE 2024–25 syllabus. It includes exam-focused short and long questions, solved numericals, and labelled ray diagrams, helping students grasp complex optics concepts easily. Whether preparing for final exams or daily practice, this booklet is your go-to revision partner for mastering the Light chapter with confidence.

Why Choose This Book?

✅ Covers all NCERT in-text and end-of-chapter questions

✅ Includes ray diagrams, formulas, and solved numericals

✅ Answers written in CBSE exam pattern

✅ Additional HOTS, assertion-reason, and MCQ practice

✅ Saves revision time with well-structured solutions

✅ Trusted by thousands of students preparing for CBSE board exams

What You Will Learn?

✅ Light seems to travel in straight lines.

✅ Mirrors and lenses form images of objects. Images can be either real or virtual, depending on the position of the object.

✅ The reflecting surfaces, of all types, obey the laws of reflection. The refracting surfaces obey the laws of refraction.

✅ New Cartesian Sign Conventions are followed for spherical mirrors and lenses.

✅ Mirror formula, 1/u + 1/v = 1/f, gives the relationship between the object-distance (u), image-distance (v), and focal length (f) of a spherical mirror.

✅ The focal length of a spherical mirror is equal to half its radius of curvature.

✅ The magnification produced by a spherical mirror is the ratio of the height of the image to the height of the object.

✅ A light ray travelling obliquely from a denser medium to a rarer medium bends away from the normal. A light ray bends towards the normal when it travels obliquely from a rarer to a denser medium.

✅ Light travels in vacuum with an enormous speed of 3×108 m s-1. The speed of light is different in different media.

✅ The refractive index of a transparent medium is the ratio of the speed of light in vacuum to that in the medium.

✅ In case of a rectangular glass slab, the refraction takes place at both air-glass interface and glass-air interface. The emergent ray is parallel to the direction of incident ray.

✅ Lens formula, 1/v -  1/u = 1/f, gives the relationship between the object-distance (u), image-distance (v), and the focal length (f) of a spherical lens.

✅ Power of a lens is the reciprocal of its focal length. The SI unit of power of a lens is dioptre

What's Inside the Book? 

Total Pages: 12–14

Format: Printable PDF (Instant Download)

Content Includes:

✅ 1-mark to 5-mark board-level questions

✅ NCERT back exercise and in-text questions

✅ Numericals on mirror and lens formula

✅ Important ray diagrams: concave/convex mirrors, lenses

✅ HOTS, MCQs, and past exam-style questions

Who Can Benefit from This Book?

✅ CBSE Class 10 students preparing for board exams

✅ Teachers and tutors looking for question bank material

✅ Parents guiding children in exam revision

✅ Students needing help with numericals and diagrams

✅ Anyone who wants clarity + writing practice in Physics

How to Use This Book Effectively? 

✅ Attempt each question yourself first to build confidence

✅ Use the solutions to compare and refine your answers

✅ Practice numericals and diagrams multiple times

✅ Mark tricky questions for repeated revision

✅ Revise 3–5 questions daily in the last two weeks before exams

Frequently Asked Questions (FAQs)