what is the formula for calculating diopter and focal length please explain well and with example
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Diopter is SI unit of power . Now how to calculate power ?
Power =1/f(m)
Or
Power =100/f(cm)
And f=1/p
For example if a lens has power +2
F=1/p =1/2 =+0.2m is focal length +sign shows it’s convex lens and -ve sign shows concave lens
Hope this helps =)
Power =1/f(m)
Or
Power =100/f(cm)
And f=1/p
For example if a lens has power +2
F=1/p =1/2 =+0.2m is focal length +sign shows it’s convex lens and -ve sign shows concave lens
Hope this helps =)
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