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Where must a point source of light be placed in front of a convex lens so as to obtain a parallel beam of light?
Where must a point source of light be placed in front of a convex lens so as to obtain a parallel beam of light?
Class 10 | ICSE | Physics | Refraction through a Lens | Selina
Where must a point source of light be placed in front of a convex lens so as to obtain a parallel beam of light?

Solution:

When a source of light is placed at the first focal point, which is the focal point to the left of the optical centre of the convex lens, the rays of light refracted through the convex lens produce a parallel beam of light.

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