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Concave lens is also called as lens....

Concave lens is also called as _______lens.

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(i) Rays travelling parallel to the principal axis of a concave lens diverge after refraction in such a way that they appear to be coming out of a point on the principal axis.
(ii) This point is called the principal focus of the concave lens.
(iii) Light rays parallel to the principal axis falling on a concave lens go away from one another (diverge) after refraction. So, this type of lens is called diverging lens.
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