GENERAL KNOWLEDGE

Detailed explanation-1: -Solution(By Examveda Team) Large astronomical telescopes always use as objective combination of lenses.

Detailed explanation-2: -Convex lens is used as an objective lens of an astronomical telescope. The convex lens used has high focal length.

Detailed explanation-3: -This type of telescope is called a refracting telescope. Most refracting telescopes use two main lenses. The largest lens is called the objective lens, and the smaller lens used for viewing is called the eyepiece lens.

Detailed explanation-4: -The larger the effective diameter of the objective lens is, the greater the light-collecting power. This results in a brighter and higher resolution image.