Class 10 Science - Reflection and Refraction of Light PDF

Class X Science - Reflection and Refraction of Light General Instructions: 1. All questions are compulsory. 2. Marks are indicated against each question. 3. Draw neat diagrams wherever necessary. Section A: Very Short Answer Questions (1 Mark Each) 1. State the laws of reflection of light. 2....

Class X Science - Reflection and Refraction of Light General Instructions: 1. All questions are compulsory. 2. Marks are indicated against each question. 3. Draw neat diagrams wherever necessary. Section A: Very Short Answer Questions (1 Mark Each) 1. State the laws of reflection of light. 2. Define the principal focus of a concave mirror. 3. What is the refractive index of a medium? 4. Write the mirror formula and explain the terms involved. 5. State the relationship between the angle of incidence and angle of refraction when light passes through a Section B: Short Answer Questions (2 Marks Each) 6. Draw a ray diagram to show the formation of an image by a concave mirror when the object is placed be 7. Write the difference between real and virtual images. 8. What is the critical angle? Explain with a diagram. 9. Explain why a pencil partially immersed in water appears bent at the surface. 10. Derive the relationship between the focal length and radius of curvature of a spherical mirror. Section C: Long Answer Questions (3 Marks Each) 11. An object 4 cm in size is placed 25 cm in front of a concave mirror of focal length 15 cm. Determine the 12. Draw a ray diagram for refraction of light through a rectangular glass slab. Mark the angles of incidence 13. State Snell's law of refraction and explain its significance. 14. Derive the lens formula and explain the terms used in it. 15. Explain the phenomenon of total internal reflection with the help of two examples. Section D: Numerical Problems (5 Marks Each) 16. A convex lens has a focal length of 20 cm. An object is placed at a distance of 30 cm from the lens. Find the position, nature, and magnification of the image formed. 17. The refractive index of water is 1.33 and that of glass is 1.5. Calculate the speed of light in water and glass. (Speed of light in vacuum = 3 x 10^8 m/s) 18. A ray of light passes through a prism and deviates by 30°. If the angle of incidence is 45° and the angle of emergence is 40°, calculate the refractive index of the material of the prism.