A convex lens of focal length f1 is held in contact with a concave lens of focal length f2. We can find rough focal length of the combination only when |
|||||||
(a) |
f1 = f2 |
(b) |
f1 < f2 |
(c) |
f1 > f2 |
(d) |
A convex lens of focal length f1 is held in contact with a concave lens of focal length f2. We can find rough focal length of the combination only when |
|||||||
(a) |
f1 = f2 |
(b) |
f1 < f2 |
(c) |
f1 > f2 |
(d) |