Two similar plano-convex lenses are combined together in three different ways as shown in the adjoining figure. The ratio of the focal lengths in three cases will be
a) |
b) |
c) |
d) |
Two similar plano-convex lenses are combined together in three different ways as shown in the adjoining figure. The ratio of the focal lengths in three cases will be
a) |
b) |
c) |
d) |
(b) In each case two plane-convex lens are placed close to each other, and |