Test Paper : CBSE Class X  Self Evaluation Tests For Science : Light - Reflection & Refraction (Set-2)

TIME : 1 Hr M.M.:20

Instructions:
a) Attempt all Questions
b) Draw diagrams wherever necessary.
c) Use/Write the formulae and appropriate expressions to illustrate 
your answer and for reasoning wherever necessary.


( Q.1 – Q.5 carry 1 MARK)

1. Define power of a lens.

2. Which mirror is used as a rear view mirror in automobiles? Why?

3. What are the characteristics of image formed by plane mirrors?

4. State Snell’s Law for refraction of light.
5. What are the values of (i) angle of incidence (ii) the angle of reflection for normal incidence on a plane mirror surface?


( Q.6 – Q.8 carry 2 MARK)

6. The refractive index of water and glass w.r.t air are 4/3 and 3/2 respectively. Find the refractive index of glass w.r.t water.
7. Define critical angle for a medium. State the conditions necessary for total internal reflection.


8. Draw ray diagrams to show the formation of image of an object by a concave mirror when the object is placed
i) Beyond Centre of curvature ii) between focus and pole of the mirror

( Q.9 – Q.11 carry 3 MARK)
9. Define the following regarding reflection of light from curved mirrors
i) Principal Focus ii) Pole iii) Radius of Curvature

10. Radius of curvature of convex mirror used in automobile is 2.00 m. A truck is coming behind it at a constant distance of 3.50 m. Calculate: 
i) Position of image. ii) Size of image relative to size of the truck.
iii)Nature of image. 

11. A 2.0 cm high object is placed at a distance of 20 cm from