Where should the light source (bulb) be place | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) In a searchlight or torch,a concave mirror is used as a reflector.According to the properties of a concave mirror,when a light source is placed at

Vedclass · Accepted Answer

At the principal focus

Vedclass · Answer

(C) In a searchlight or torch,a concave mirror is used as a reflector.According to the properties of a concave mirror,when a light source is placed at the principal focus $(F)$,the light rays originating from it strike the mirror and are reflected as a parallel beam of light.These parallel rays do not diverge significantly and can travel over a long distance.Therefore,the bulb is placed at the principal focus.

Where should the light source (bulb) be placed in the reflector of a searchlight or torch so that the light rays travel over a long distance?

Similar Questions

Which of the following statements is true?

Where should an object be placed in front of a convex lens to obtain an image on the same side as the object?

Which of the following statements is true regarding a real image of an object?

How will you distinguish between a convex and a concave lens without touching them?

What is the type of the final image,as compared to the object,in the compound microscope?

Vedclass Test Series

Exam Paper Generator

Online Exam Module