A convex lens has a focal length of 20 cm. What is the power of this lens?

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MCQ (Single)Focal Length of Spherical Lenses

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Define focal length of a spherical lens.

TextImage Formation by Concave LensSign Convention for Spherical LensesFocal Length of Spherical Lenses

A convex lens of focal length 10 cm is placed in contact with a concave lens of focal length 20 cm. Calculate the focal length and power of the combination. State the nature of the combination so formed. (CBSE 2024)

TextFocal Length of Spherical LensesPower of a Lens