alleryThe line through the pole and the centre of curvature is the:
APrincipal arc
BPrincipal area
CPrincipal axis
DPrincipal angle
Answer & Solution
Correct answer: C. Principal axis
1. It runs straight through the mirror.
2. It is taken as the x-axis in the sign convention.
3. It is the principal axis.
_Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_
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