The radius of curvature of a spherical mirror is 20 cm.what is its focal length
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5
The focal length of a 'spherical mirror' is half of its 'radius of curvature.
Focal length= R/2
= 20/2= 10 cm
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2
Answer:
since r = 2f
therefore if r = 20 cm
so, f = 10 cm
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