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A Small Bulb is Placed at the Focal Point of a Converging Lens. When the Bulb is Switched On, the Lens Produces: (A) a Convergent Beam of Light (B) a Divergent Beam of Light (C) a Parallel Beam of Light (D) a Patch of Coloured Light - CBSE Class 10 - Science

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Question

A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces:

(a) a convergent beam of light
(b) a divergent beam of light
(c) a parallel beam of light
(d) a patch of coloured light

Solution

 A parallel beam of light

The reason being, a beam of light coming from the focus of a converging lens becomes parallel, after refraction from the lens.

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Solution A Small Bulb is Placed at the Focal Point of a Converging Lens. When the Bulb is Switched On, the Lens Produces: (A) a Convergent Beam of Light (B) a Divergent Beam of Light (C) a Parallel Beam of Light (D) a Patch of Coloured Light Concept: Refraction of Light - Image Formation by Lenses - Concave Lens.
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