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A student has been given a project to prepare an astronomical telescope, she has to select two lenses of type |
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(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 |