NCERT Class X Science Class: Chapter –10. Light – Reflection and Refraction – Part-3

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Question 11:

A full length image of a distant tall building can definitely be seen by using

(a) A concave mirror

(b) A convex mirror

(c) A plane mirror

(d) Both concave as well as plane mirror

Answer: B

Question 12:

In torches, search lights and headlights of vehicles the bulb is placed

(a) Between the pole and the focus of the reflector

(b) Very near to the focus of the reflector

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

(d) At the center of curvature of the reflector

Answer: B

Question 13:

The laws of reflection hold good for

(a) Plane mirror only

(b) Concave mirror only

(c) Convex mirror only

(d) All mirrors irrespective of their shape

Answer: D

Question 14:

The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in Figure. Which one of them is correct?

(a) A

(b) B

(c) C

(d) D

Answer: B

Question 15:

You are given water, mustard oil, glycerin and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?

(a) Kerosene

(b) Water

(c) Mustard oil

(d) Glycerin

Answer: D