CBSE Class 10 Science Light Reflection and Refraction Quiz 1

1. Which of the following can make a parallel beam of light when light from a point source is incident on it?

A Concave mirror as well as convex lens B Convex mirror as well as concave lens C Two plane mirrors placed at 90° to each other D Concave mirror as well as concave lens

2. A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

A -30 cm B -20 cm C -40cm D -60 cm

3. Under which of the following conditions a concave mirror can form an image larger than the actual object?

A When the object is kept at a distance equal to its radius of curvature B When object is kept at a distance less than its focal length C When object is placed between the focus and centre of curvature D When object is kept at a distance greater than its radius of curvature

4. The diagrams showing the correct path of the ray after passing through the

A II and III only B I and II only C I, II and III D I, II and IV

5. A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be

A greater than unity B less than unity C equal to unity D zero

6. Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box?

A A rectangular glass slab B A convex lens C A concave lens D A prism

7. A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as show in the figure. Which of the following could be inside the box?

A Concave lens B Rectangular glass slab C Prism D Convex lens

8. Which of the following statements is true?

A A convex lens has 4 dioptre power having a focal length 0. 25 m B A convex lens has -4 dioptre power having a focal length 0. 25 m C A concave lens has 4 dioptre power having a focal length 0. 25 m D A concave lens has -4 dioptre power having a focal length 0. 25 m.

9. Magnification produced by a rear view mirror fitted in vehicles

A is less than one B is more than one C is equal to one D can be more than or less than one depending upon the position of the object in front of it.

10. Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?

A 15 cm in front of the mirror B 30 cm in front of the mirror C between 15 cm and and 30 cm in front of the mirror D more than 30 cm in front of the mirror