If the focal length of a mirror is 40cm then radius of curvature is
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Focal length (f) =40cm
Radius of curvature(R) =?
f=R/2
R=2f
=2×40
=80cm
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Answer:
radius of curvature= 80 cm
Explanation:
because focal length= RADIUS OF CURVATURE/2
therefore 40= R/2
40× 2= R
80 Cm = R
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