A plano-convex lens
The diameter of the aperture of a plano-convex lens is and its thickness at the center is If the speed of light in the material of the lens is , the focal length (in ) of the lens to the nearest integer is
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
R d R t = + − ( ) 2 2 2 2 1 − = − t R d R R 2 2 2 1 1 − = − d t R R 2 (3) 90 15 2 (0 3) 6 = = = × ⋅ R cm 1 2 1 1 1 ( 1) = − − f R R µ 1 3 1 1 2 15 = − f f = 30 cm