Question

If the focal length of a concave mirror is 12 cm, find its radius of curvature.​

Answer 1

Answer:

24

Explanation:

radius=2f

radius=2*12

radius=24

Answer 2

ANSWER:

24cm

EXPLANATION:

FOCAL LENGTH IS THE DISTANCE BETWEEN FOCUS AND POLE OF A SPHERICAL MIIROR EITHER CONCAVE OR CONVEX.

CURVATURE IS THE GEOMETRICAL CENTRE OF THE SPHERE WHOSE THE LENS IS A PART.

DISTANCE BETWEEN FOCUS AND POLE AND CURVATURE AND FOCUS ARE EQUAL.

NOW FOR A SPHERICAL MIRROR RADIUS OF CURVATURE IS THE DISTANCE BETWEEN CURVATURE AND POLE.

SINCE- DISTANCE BETWEEN FOCUS AND POLE AND CURVATURE AND FOCUS ARE EQUAL.

THEREFORE:

$radius \: of \: curvature \: = \: focal \: length \: \times 2 \\ r = 2f$

THEREFORE:

RADIUS OF CURVATURE OF GIVEN CONCAVE MIRROR = 12×2= 24cm.

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HELP TIPS: SEE DIAGRAM FOR UNDERSTANDING STRUCTURE OF A CONCAVE MIRROR.

DRAG THE PORTION OF SCREEN TO LEFT WHERE FONTS ARE CHANGED TO SEE THE

FULL FORMULA.

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BY SCIVIBHANSHU

THANK YOU

STAY CURIOUS