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For visual observation:
Magnification = (Focal Length of Objective Lens) divided by (Focal Length of Eyepiece)
(They have to be measured in the same units.)
For prime-focus Photography:
(One focal-length of the Objective Lens on the film) = (one radian in the sky)
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How do four telescopes of diameter 8m each gather as much light as one of diameter 16m?
Four telescopes with 8m diameter each can gather as much light as one with 16m diameter because they can be combined using interferometry techniques to effectively act as a single telescope with the equivalent light-gathering area. By correlating the signals from the individual telescopes, the resolution and sensitivity can be increased as if they were a single larger telescope.
The light-gathering power of a telescope varies with the of the diameter of the lens or mirror?
The light-gathering power of a telescope is directly proportional to the area of the lens or mirror, which is determined by the square of its diameter. A larger diameter means more light can be collected, resulting in brighter and clearer images. This is why larger telescopes with bigger lenses or mirrors are favored for stargazing and deep-space observation.
What are the 4 properties of a telescope?
The four main properties of a telescope are its aperture (diameter of the primary lens or mirror), magnification (how much larger the telescope makes distant objects appear), focal length (distance from the lens or mirror to the focal point), and resolution (the ability to distinguish fine details or separate closely spaced objects).
What does the light gathering ability of a telescope depend on?
A refracting telescope is a type of optical telescope. It was used in astronomical telescopes and spy glasses. Objective lens are used to produce the image.
If the radius of an objective mirror of a telescope is tripled how will its light gathering power be affected?
It will become 9 times as great.
