Question

Concave lens of very short focal length causes

Answer 1

Answer:

convex lens: A convex lens is thicker in the middle than at edges. it is a covering lens.it products mostly real images.it is used to treat hypermetropia.

focal length: the power of lens depends on the focal length of the lens.the eye defect'presbyopia can be corrected by focal length. A convex lens of local length 5 cm..........