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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
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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