Question

The power of a concave lens is positive. [True/False]

Answer 1

false..

coz concave lens the power is negative because the focal length is negative. ... For a converging lens the focal length is taken as positive and for a diverging lens the focal length is taken as negative. As the concave lens is a diverging lens the focal length is negative. Hence power is negative.

i hope itz help u.

Answer 2

☯ AnSwEr :

False, power of a concave lens is positive.

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★ Additional Information :

• Focal length of a concave lens is negative.

• Concave lens is also known as diverging lens because it diverges the ray.

• The image formed by concave lens is always virtual and erect.

• The image formed by the concave lens is always smaller than the height of object.

• A concave lens is a lens that possesses at least one surface that curves inwards.

• A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).