establish the relation between radius of curvature and focal length of concave mirror f=2r or r=f÷2
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radius of curvature:the distance between pole to centre of curvature is called radius of curvature.
focal length:the distance between pole to principle focus is called focal length.
concave mirror forms both real and virtual images ,that is
f=R/2
so,R=2f(or)
focal length:the distance between pole to principle focus is called focal length.
concave mirror forms both real and virtual images ,that is
f=R/2
so,R=2f(or)
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