What is the focal length of a convex lens of focal length 30 cm in contact with a concave lens o... - YouTube
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Diverging Lens
From the ray diagram show, calculate the focal length of the concave lens.
a Explain with the help of a diagram, why the concave lens is also called a diverging lens. b Define the principal focus of a concave lens.
Principal Focus (and other parts) of Concave and Convex Lens - Teachoo
A divergent lens has a focal length of 30 cm. At what distance should an object of height 5 cm from the optical centre of the lens be placed so that its
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optics - determining focal length of converging lens - Physics Stack Exchange
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Diverging lens | optics | Britannica
Thin lens sign conventions (article) | Khan Academy
Defining focal length - YouTube
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