NCERT Class X Science Class: Chapter –10. Light – Reflection and Refraction – Part-2

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Question 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

Answer: A

Question 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 shown in the Figure. Which of the following could be inside the box?

(a) Concave lens

(b) Rectangular glass slab

(c) Prism

(d) Convex lens

Answer: D

Question 8:

Which of the following statements is true?

(a) A convex lens has 4 diopter power having a focal length

(b) A convex lens has –4 diopter power having a focal length

(c) A concave lens has 4 diopter power having a focal length

(d) A concave lens has –4 diopter power having a focal length

Answer: A

Question 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

Answer: A

Question 10:

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

(a) in front of the mirror

(b) in front of the mirror

(c) Between in front of the mirror

(d) More than in front of the mirror

Answer: B