The angular resolution is the angular size of the smallest features that a telescope can see.
The angular size of the smallest features that a telescope can see is called the angular resolution.
The angular resolution that a telescope could achieve if it were limited only by the interference of light waves, it is smaller for larger telescopes. A small mirror in a reflecting telescope, used to reflect light gathered by the primary mirror toward an eyepiece or instrument. Angular resolution is the angular magnitude of the smallest features seen by a telescope.
Angular resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera.
The correct answer is angular resolution.
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