Question

four lens are made of glass and the radius of curvature of each faces is . which will have the greatest focal power
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Answer 1

Explanation:

 Four lenses are made of glass and the radius of curvature of each face is given below Which will have the greatest focal power 10 cm convex 

Answer 2

The higher is the radius of curvature of the lens the higher will be the focal length.

Explanation:

• this is because the refractive index of all the lenses which are given above are same. Hence the changes which will be present and due to the radius of curvature.
• With increase in the radius of curvature there is decrease in the refraction of light and hence the bending of light will decrease resulting in decrease of the focal power of the length. So the focal length will increase