A small electric lamp is placed at the focus of a concave mirror. the incident rays after reflection will form a
(a) parallel beam of light.
(b) converging beam of light.
(c) diverging beam of light.
(d) bright image of the lamp.

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Solution

(a) parallel beam of light
When an object is placed at the focus of a concave mirror, the reflected rays are parallel to one another.

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A small electric lamp is placed at the focus of a concave mirror. the incident rays after reflection will form a (a) parallel beam of light. (b) converging beam of light. (c) diverging beam of light. (d) bright image of the lamp.

(a) parallel beam of light When an object is placed at the focus of a concave mirror, the reflected rays are parallel to one another.

A small electric lamp is placed at the focus of a concave mirror. the incident rays after reflection will form a
(a) parallel beam of light.
(b) converging beam of light.
(c) diverging beam of light.
(d) bright image of the lamp.

(a) parallel beam of light
When an object is placed at the focus of a concave mirror, the reflected rays are parallel to one another.