In the image formation from spherical mirror only paraxial rays are considered because

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in the case of paraxial rays the angle of incidence nearly approaches to zero

in the case of paraxial rays, the aperture of the mirror is negligible

paraxial rays, form the nearly a point image of a point source

all the above

answer is D.

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Detailed Solution

In the image formation from spherical mirror only paraxial rays are considered because paraxial rays, form the nearly a point image of a point source, in the case of paraxial rays, the aperture of the mirror is negligible and in the case of paraxial rays the angle of incidence nearly approaches to zero.

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