Question

b) The distance between the
length.
and the principal focus of the mirror is called the focal
i) radius
ii) principal axis
iii) pole
iv) centre of curvature​

Answer 1

Explanation:

principal axis- centre of curvature- vertex.

focal point-radius of curvature-focal length.

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Answer 2

answer

the distance between the length and the principal focus of the mirror is called focus

ii) principal axis