The principal focus of the spherical mirror lies midway between and __.

pole and focus

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pole and centre of curvature

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focus and radius of curvature

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centre of curvature and mirror

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Solution

The correct option is B pole and centre of curvature
The principal focus of the spherical mirror lies midway between pole and centre of curvature.
The Relation between radius of curvature $R$ and focal length $f$ is
$R = 2 f$
where
$R = d i s t a n c e P C$
$f = d i s t a n c e P F = d i s t a n c e F C$
and
$P C = P F + F C$
$\Rightarrow R = f + f = 2 f$

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Q. Question 2
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

(a) Between the principal focus and the centre of curvature
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Q. State whether true or false :

The principal focus of a spherical mirror lie midway between the pole and centre of curvature.

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

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The principal focus of the spherical mirror lies midway between ______ and ________.

The correct option is B pole and centre of curvatureThe principal focus of the spherical mirror lies midway between pole and centre of curvature.The Relation between radius of curvature R and focal length f isR=2f whereR=distance PCf=distance PF=distance FCand PC=PF+FC⇒R=f+f=2f

The principal focus of the spherical mirror lies midway between and __.