where is the bulb placed in torches and search lights?
a. btw pole nd focus
b.very near to the focus of the reflector
c. btw the focus and centre of curvature of reflector
d. at the centre of curvature
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Explanation:
In torches, search lights and headlights of vehicles, the bulb is placed very near to the focus of the reflector (or concave mirror). It is due the reason that light rays after falling on reflecting surface become parallel to the principal axis of the mirror, and a concentrated beam of light is obtained.
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Answer:
c is the right answers
between the focus and centre of curvature of reflector
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