A small electric lamp is placed at the focus of a convex lens. State the nature of beam of light produced by the lens. Draw a diagram to show this.


When an object is placed at the focus of a converging lens then the light rays from the object will get refracted from the convex lens and become parallel to the principal axis. The image will be formed at infinity.

So, if a small electric lamp is placed at the focus of a convex lens, a beam of light is produced which is parallel to the principal axis.

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Updated on: 10-Oct-2022

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