Practice Sheets on Light Reflection & Refraction

Light reflection and refraction Worksheet-10

1. A concave mirror produces three times magnified real image of an object placed at 10 cm in front of it Where is the image located ?

2. A ray of light traveling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal ?  Give Reason.

3. Light enters from air to glass having refractive index 1.5. What is the speed of light in glass ? The speed of light in vacuum is 3 × 10⁸ m/s.

4. The refractive index of diamond is 2.42. What is the meaning of this statement ?

5. Define one dioptre of power of a lens.

Light reflection and refraction Worksheet-11

1. Name the type of mirror used in the following situation also give reason:

Solar furnace.

2. One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.

3. An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. Draw the ray diagram and find the position, size and the nature of the image formed.

4. A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens ? Draw the ray diagram.

Light reflection and refraction Worksheet-12

1. What is the range of wavelength of visible light ?

2. Can light travel in vacuum ? If yes, with what speed ?

3. What is the speed of light in air ?

4. What is a ray of light ?

5. What is meant by pencil of light ?

6. Name the best reflector of light.

7. Can normal to a mirror be taken as a normal ray ?