and are the focal lengths of a convex lens for violet and red light respectively and and are the focal lengths of a concave lens for violet and red light respectively, then |
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a) |
and |
b) |
and < |
c) |
and |
d) |
and |
and are the focal lengths of a convex lens for violet and red light respectively and and are the focal lengths of a concave lens for violet and red light respectively, then |
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a) |
and |
b) |
and < |
c) |
and |
d) |
and |
(b) According to lens makers formula Since and Note: Always keep in mind that whenever you are asked to compared (greater than or less than) or you must not apply sign conventions for comparison |