The real image of an object formed by the objective, must lie
A)in the plane of cross hairs
B)at the centre of the telescope
C)at the optical centre of the eye-piece
D)anywhere inside the telescope

Question

Quizplus · Accepted Answer

The real image formed by the objective lens of a telescope must lie in the plane of the cross hairs (also known as the focal plane of the eyepiece) for proper viewing and measurement. This ensures that the observer sees both the cross hairs and the image sharply focused at the same time, allowing for precise alignment or measurement.

The Real Image of an Object Formed by the Objective