A student has been given a project to prepare an astronomical telescope, she has to select two lenses of type |
|||
(a) |
concave lenses of different focal length |
(b) |
concave lenses of same focal length |
(c) |
convex lenses of different focal length |
(d) |
convex lenses of same focal length |
A student has been given a project to prepare an astronomical telescope, she has to select two lenses of type |
|||
(a) |
concave lenses of different focal length |
(b) |
concave lenses of same focal length |
(c) |
convex lenses of different focal length |
(d) |
convex lenses of same focal length |