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Q.

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

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a

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

b

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

c

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

d

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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