The light gathering ability of a telescope is most dependent on the diameter of its primaryobjective.

Question

Quizplus · Accepted Answer

The diameter of the primary objective determines the amount of light that the telescope can gather, so a larger diameter means greater light-gathering power. The larger the diameter of the primary objective, the more light it can gather, which increases the telescope's ability to form a brighter and more detailed image.

The Light Gathering Ability of a Telescope Is Most Dependent