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  • 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

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

Answers (1)

Hence, the correct answer is option (b).

Explanation:-

In torches, searchlights, and vehicle headlights, the reflector is a concave mirror. The bulb is placed near the focus of the concave reflector. This placement ensures that:

  1. The light rays emitted from the bulb are reflected as parallel beams (collimated light) when they hit the reflector.
  2. Parallel beams provide long-range and focused illumination, which is ideal for applications like headlights and searchlights.

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