Question

.A __________mirror always produces a small, virtual and erect image of an object.

(a) Convex (b) Concave (c) Plane (d) Plano - convex

2. Which one of the following material cannot be used to make a lens?

(a) Water (b) Glass (c) Plastic (d) Clay

3. A ray of light travelling parallel to the principal axis of a convex mirror passes through its

_____________ after reflection.

(a) Radius of curvature (b) Centre of curvature

(d) Focus point (d) Pole

4. In torches, searchlights and headlights of vehicles, the bulb is placed:

(a) Between the pole and focus of the reflector

(b) Very near to the focus of the reflector

(c) Between focus and centre of curvature of the reflector

(d) At the centre of curvature of the reflector

5. The laws of reflection are applicable to all types of surfaces.

(a) True (b) False (c) Only on plane surfaces (d) Not on rough surface

6. Which spherical mirror has reflecting surface on its hollow side?

(a) Convex mirror (b) Concave mirror

(c) Concave or convex mirror (d) Both concave and convex mirror

7. Refractive index of a material tells us about the _____________ in the medium.

(a) Speed of light (b) Movement of particles

(c) Divergence of light (d) Convergence of light

8. The colour of an object depends upon the light which it :

(a) Reflects (b) Transmits (c) Absorbs (d) Refracts

9. The phenomenon of change in the direction and speed of light when it travels from one material

medium to another is called

(a) Polarization of light (b) Refraction of light

(c) Convergence of light (d) Divergence of light

10. A student obtained a blurred image of an object on a screen by using a concave mirror. In order to

obtain a sharp image on the screen he will have to shift the mirror?

(a) Towards the screen.

(b) Away from the screen.

(c) Either towards or away from the screen depending upon the position of the object.

(d) To a position very far away from the screen.​

Answer 1

Answer:

1a 2c 3c 4a 5b 6a 7a 8a 9b 10b