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Here are some additional resources and practice questions for Chapter 1: Light - Reflection and Refraction: *Practice Questions:* *Multiple Choice Questions:* 1. Which of the following is a characteristic of a concave mirror? a) Always forms a virtual image b) Always forms a real image c) Forms a magnified image d) Forms a reduced image 2. What is the refractive index of water? a) 1.33 b) 1.5 c) 2.0 d) 3.0 3. A light ray passes from air into glass. What happens to its speed? a) Increases b) Decreases c) Remains same d) Becomes zero *Short Answer Questions:* 1. Describe the difference between spherical and parabolic mirrors. 2. Explain the concept of refractive index. *Long Answer Questions:* 1. Derive the lens maker's formula. 2. Explain the total internal reflection phenomenon. *Numerical Problems:* 1. A concave mirror has a focal length of 20 cm. Find the image distance if the object distance is 30 cm. 2. A light ray passes from air into glass with refractive index 1.5. Find the angle of refraction if the angle of incidence is 30°. *Key Concepts and Formulas:* *Reflection:* 1. Law of Reflection: ∠i = ∠r 2. Mirror Formula: 1/f = 1/do + 1/di *Refraction:* 1. Snell's Law: n1 sin(θ1) = n2 sin(θ2) 2. Refractive Index: n = c/v *Important Terms:* 1. Apex 2. Pole 3. Principal axis 4. Focal length 5. Object distance 6. Image distance 7. Refractive index 8. Total internal reflection Would you like: 1. More practice questions 2. Detailed explanations of specific topics 3. Summaries of other chapters 4. Help with numerical problems 5. Past year CBSE board papers Please let me know!

Here are previous year questions from CBSE Board exams for Class 10 Physics, Chapter 1: Light - Reflection and Refraction: _2020_ 1. A concave mirror has focal length 20 cm. Find image distance if object distance is 30 cm. (3 marks) 2. A light ray passes from air into glass with refractive index 1.5. Find angle of refraction if angle of incidence is 45°. (3 marks) 3. Describe the difference between spherical and parabolic mirrors. (5 marks) _2019_ 1. Find focal length of convex lens if object distance is 20 cm and image distance is 30 cm. (3 marks) 2. A plane mirror reflects light ray at angle 30°. Find angle of incidence. (3 marks) 3. Explain total internal reflection with example. (5 marks) _2018_ 1. Concave mirror has radius curvature 40 cm. Find focal length. (3 marks) 2. Convex lens has focal length 15 cm. Find image distance if object distance 20 cm. (3 marks) 3. Describe construction convex lens. (5 marks) _2017_ 1. Find critical angle glass-air interface refractive index 1.5. (3 marks) 2. Concave lens focal length 25 cm. Find image distance object distance 30 cm. (3 marks) 3. Explain refraction application. (5 marks) _2016_ 1. Plane mirror reflects light ray angle 45°. Find angle incidence. (3 marks) 2. Convex mirror focal length 30 cm. Find object distance image distance 20 cm. (3 marks) 3. Describe difference real virtual images. (5 marks) _2015_ 1. Concave mirror forms image distance 40 cm mirror. Find object distance focal length 20 cm. (3 marks) 2. Light ray passes water air. Find angle refraction angle incidence 60°. (3 marks) 3. Describe construction concave mirror. (5 marks) _2014_ 1. Find focal length convex lens object distance 25 cm image distance 35 cm. (3 marks) 2. Plane mirror reflects light ray angle 30°. Find angle incidence. (3 marks) 3. Explain dispersion application. (5 marks) _2013_ 1. Concave mirror radius curvature 30 cm. Find focal length. (3 marks) 2. Convex lens focal length 20 cm. Find object distance image distance 30 cm. (3 marks) 3. Describe total internal reflection. (5 marks) Would you like: 1. More previous year questions 2. Detailed explanations 3. Solutions to numerical problems 4. Help with specific topics Please let me know!

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