In image formation from spherical mirrors, only paraxial rays are considered because they
(a) are easy to handle geometrically
(b) contain most of the intensity of the incident light
(c) from nearly a point image of a point source
(d) show minimum dispersion effect.

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Solution

(c) form nearly a point image of a point source

Since, when reflected back, they meet at a single point forming a point image of a point source.

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In image formation from spherical mirrors, only paraxial rays are considered because they (a) are easy to handle geometrically (b) contain most of the intensity of the incident light (c) from nearly a point image of a point source (d) show minimum dispersion effect.

(c) form nearly a point image of a point source Since, when reflected back, they meet at a single point forming a point image of a point source.

In image formation from spherical mirrors, only paraxial rays are considered because they
(a) are easy to handle geometrically
(b) contain most of the intensity of the incident light
(c) from nearly a point image of a point source
(d) show minimum dispersion effect.

(c) form nearly a point image of a point source

Since, when reflected back, they meet at a single point forming a point image of a point source.