The curvature radii of a concavo convex glass lens are 20 cm and 60 cm the convex surface of the - Physics - Ray Optics And Optical Instruments

Question

The curvature radii of a concavo convex glass lens are 20 cm and 60
cm the convex surface of the lens is silvered With the lens
horizontal the concave surface is filled with water The focal
length of effective mirror is

Sanjay Singh · Accepted Answer

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The curvature radii of a concavo convex glass lens are 20 cm and 60 cm the convex surface of the lens is silvered. With the lens horizontal the concave surface is filled with water. The focal length of effective mirror is