GENERAL KNOWLEDGE

Detailed explanation-1: -An optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses, or of curved mirrors and lenses, by which rays of light are collected and focused and the resulting image magnified.

Detailed explanation-2: -binoculars, optical instrument, usually handheld, for providing a magnified stereoscopic view of distant objects.

Detailed explanation-3: -The concave lens serves as the ocular lens, or the eyepiece, while the convex lens serves as the objective. The lens are situated on either side of a tube such that the focal point of the ocular lens is the same as the focal point for the objective lens.