Test Paper : CBSE Class X  Self Evaluation Tests For Science : Light - Reflection & Refraction (Set-3)

TIME: 1 Hr MM: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. Distinguish between real and virtual image.
2. List two points of differences between concave mirror and convex mirror?
3. The refractive index of diamond is 2.42. What is the meaning of this statement?
4. Define critical angle for a medium.
5. How will you distinguish between concave, convex, plane mirror without touching?

( Q.6 – Q.8 carry 2 MARK)

6. A diamond (R.I. w.r.t air = 2.42) is dipped in a liquid of refractive index 1.4. Find the refractive index of diamond w.r.t the liquid.

7. Draw ray diagrams to show the formation of image of an object by a concave mirror when the object is placed
i) Between centre of curvature and Focus
ii) Beyondcentre of curvature

8. What are the uses of concave and convex mirrors?

( Q.9 – Q.11 carry 3 MARK)
9. Define the following regarding reflection of light from curved lenses
i) First Principal Focus 
ii) Optic centre 
iii) Convex Lens

10. Find the position, nature and size of the image of an object 3cm high placed at a distance of 9cm from a concave mirror of focal length 18cm.

11. A 5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 30 cm. Find
the position, nature and size of the image.