TEST PAPER 16 : CHAPTER 2 : LIGHT-REFLECTION AND REFRACTION : 25 MARKS

There are 13 questions in all and time limit is 45 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

1. The speed of light is ______ in vacuum.
   
   
   
   1. 3 x 10⁵ m/s
   2. 3 x 10⁸ m/s
   3. 3 x 10⁸ km/s
   4. 3 x 10⁶ km/s
      
   
   
2. We can see objects because of ______.
   
   
   
   1. reflection
   2. refraction
   3. transmission
   4. dispersion
      
   
   
3. Which of the following is a true statement?
   
   
   
   1. The power of a lens is always positive.
   2. The power of a lens is always negative.
   3. The power of a convex lens is positive.
   4. The power of a concave lens is positive.
      
   
   

   SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
   

4. Define : Radius of curvature of a mirror.
5. Mention the position, nature and the size of the image formed by a convex lens when the object is placed at 2F₁.
6. What will be the power of a convex lens of focal length 40 cm ?
   
   

   SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
   

7. Describe irregular reflection.
8. Draw the ray diagram to show the position, nature and the size of the image when an object is placed between C and F of a concave mirror.
9. State the laws of refraction.
10. An object of height 6 cm is placed at distance of 10 cm from a convex mirror with radius of curvature 30 cm. Find the position, nature and the height of its image.
    
    

    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
    

11. Explain the nature of light.
12. Explain : Reflection from plane mirror. OR    Explain : Mirage with diagram.
    
    

    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
    

13. Derive Lens formula.