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Image Formation by Convex Mirrors

All distances...

Question

All distances parallel to the principal axis are measured from the of the mirror.

A

centre of curvature

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B

focus

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C

pole

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Solution

The correct option is C pole
As per the sign conventions, the pole of the mirror is considered to be the origin. So, all distances parallel to the principal axis are measured from it.

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Q. From the understanding of cartesian sign convention for reflection by spherical mirror, students took part in group discussion for FA - 1 in classroom. Who is wrong in the group discussion?
Alpesh : All the distances are measured from the pole of a mirror parallel to the principal axis.
Beena : The distances measured in the direction of incident ray are taken positive.
Chamak : The height measured upward and perpendicular to principal axis is taken negative.
Daksha : The height measured downward and perpendicular to principal axis is taken as positive.

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