Question

construction of binoculars​

Answer 1

Binoculars are made to see the far distance more clearly it is made up of concave lens only.

Answer 2

The two telescopes have lenses that focus light and magnify the image, a process called magnification. ... They have prisms inside, which bend the light so to shorten the length of the tubes. That is why a binocular is shorter than standard telescopes of similar power. Binoculars were invented in the 17th century.