To find focal length of concave lens using convex lens
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Which type of mirror has : (a) positive focal length ? (ii) negative focal length ? - YouTube
If both Assertion is true, but the Reason is false.
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Focal Length of a Lens
Why the focal length of convex lens is always positive?
Which type of lens has negative power?A) Convex lensB) Concave lensC) Both A and BD) None
Real Images
optics - Rule sign for concave and convex lens? - Physics Stack Exchange
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Focal Length | MEETOPTICS Academy
Choose the correct option.
