If the radius of curvature -R- of a nbsp-convex mirror is 30- cm- What is its focal length-30- cm-60- cm-15- cm-10- cm-

The correct option is C 15 cm For a convex mirror, the radius of curvature R, is twice its nbsp;focal length f. R = 2f 30 = 2f f = 15 Therefore, the focal ...

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Standard IX

Physics

Relation between Focal Length and Radius of Curvature

If the radius...

Question

If the radius of curvature $(R)$ of a convex mirror is $30 c m$ . What is its focal length?

$30 c m$

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$60 c m$

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$15 c m$

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$10 c m$

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Solution

The correct option is C
$15 c m$

For a convex mirror, the radius of curvature $R$ , is twice its focal length $f$ .

$R = 2 f$
$30 = 2 f$
$f = 15$

Therefore, the focal length $f = 15 c m$

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If the radius of curvature (R) of a convex mirror is 30 cm. What is its focal length?

The correct option is C 15 cm For a convex mirror, the radius of curvature R, is twice its focal length f. R=2f 30=2f f=15 Therefore, the focal length f=15 cm

If the radius of curvature $(R)$ of a convex mirror is $30 c m$ . What is its focal length?

The correct option is C
$15 c m$

For a convex mirror, the radius of curvature $R$ , is twice its focal length $f$ .

$R = 2 f$
$30 = 2 f$
$f = 15$

Therefore, the focal length $f = 15 c m$