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

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Answers

2016-08-16T22:59:47+05:30
(b) very close to the focus of the reflector.... so that a strong  parallel beam of light is produced.


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