Question

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 centre of curvature of the reflector
(d) at the centre of curvature of the reflector

NCERT Class X
Science - Exemplar Problems

Chapter_Light – Reflection and Refraction

Answer 1

(b) very close to the focus of the reflector.... so that a strong  parallel beam of light is produced.

Answer 2

In torches, search lights and headlights of vehicles the bulb is placed very near to the focus of the reflector.

Option (b)

Explanation:

• According to the rule, the rays passing through the focus of the mirror will pass through the principal axis in the reflection, such that, the light will reflect towards the outer portion bright providing light on the roads.
• The driver can see the road in the dark night too. That’s why, the bulb in torches and headlights is near to the focus.

Learn more about focus of the reflector

Which type of reflector is used in cars headlights to produce a parallel beam of light?

https://brainly.in/question/2194871

Which mirror is used as a torch reflector? and why?? where is the bulb placed in relation to torch reflector

https://brainly.in/question/1618349