can we always say that the focus of a spherical mirror lies b/w pole and the centre of curvature ??

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Solution

Yes.The distance between pole and focus is focal length and the distance between pole and centre of curvature is called radius of curvature.And also focal length is always half of radius of curvature.

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(b) between focus and centre of curvature
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(d) beyond the centre of curvature

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Question 30
Draw ray diagrams showing the image formation by a concave mirror when an object is placed

(a) between pole and focus of the mirror
(b) between focus and centre of curvature of the mirror
(c) at centre of curvature of the mirror
(d) a little beyond centre of curvature of the mirror
(e) at infinity

Q. If a concave mirror forms a real magnified image of an object, the object is located

(a) between pole and focus
(b) between focus and centre of curvature
(c) beyond centre of curvature
(d) at centre of curvature

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