One surface of a lens is convex and the other is concave, if the radii of curvature are `r_(1)` and `r_(2)` respectively, the lens will be convex if

Concave lens and convex lens

What is the focal length of a convex lens ( mu = 1.5) with radii of curvature R.

What is the focal length of a convex lens (mu=1*5) with radii of curvature R?

For convex lens, the radii of curvatures of the first and second surface are R_(1) and R_(2) respectively. Using new Cartesian sign conventions they are

For convex lens, the radii of curvatures of the first and second surface are R_(1) and R_(2) respectively. Using new Cartesian sign conventions they are

If R_1 and R_2 are the radii of curvature of a double convex lens, the largest power will be when

Concave lens and Convex lens

The concave surface of a thin concavo-convex lens of index 1.5 has radius of curvature 50cm and 10cm respectively.The concave side is silvered andplaced on a horizontal surface as shown Focal length of silvered lens is:

If R1 and R2 are the radii of curvature of a double convex lens. The largest power will be for