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[" If "f(V)" and "f(R)" are the focal le...

[" If "f_(V)" and "f_(R)" are the focal lengths of a convex lens "],[" for violet and red light respectively and "F_(V)" and "F_(R)],[" are the focal lengths of a concave lens for violet "],[" and red light respectively,then we must have "]

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If f(V) and f_(R) are the focal lengths of a convex lens for violet and red light respectively and F_(V) and F_(R) are the focal lengths of concave lens for violet and red light respectively, then we have

If f(V) and f_(R) are the focal lengths of a concex lens for violet and red light respectively and F_(V) and F_(R) are the focal lengths of concave lens for violet and red light respectively, then we have

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If f_v and f_r are the focal lengths of a convex lens fro violet and red light respectively and F_v and F_r are the respective focal length of a concave lens,then we must have

The focal length ofa converging lens are f_v and f_r for violet and red light respectively.

The focal length of a converging lens are f_v and f_r for violet and red light respectively.

The focal length of a converting lens are f_(v) and f_(r) for violet and red lights, respectively. Which of the following is correct?