In daily life, telescopes mainly refer to optical telescopes, but in modern astronomy, astronomical telescopes include radio telescopes, infrared telescopes, X-ray telescopes and gamma-ray telescopes. The concept of astronomical telescope has been further extended to gravitational waves, cosmic rays, dark matter and other fields.
In addition, the telescope not only consists of a convex lens and a concave lens, but also presents an inverted optical lens group. But consists of a plurality of lenses and a reflecting prism. After repeated refraction and reflection, the light is adjusted to be positive, which corrects the problem of edge deformation.
Extended data:
The two numbers on the telescope represent the magnification of the telescope and the aperture of the objective lens respectively. For example, the binoculars of 10x42 represent that the magnification of the telescope is 10x, and the aperture of the objective lens is 42mm. The magnification of 10x means that the object seen through the telescope is magnified by 10 times, that is, the object at 100 meters looks like it is at 10 meters.
The magnification of a telescope is not as large as possible. The larger the magnification, the larger the distant target appears in the field of view, but it also means that the actual field of view will become smaller, which means that the luminous flux entering the telescope will decrease, which means that the target you see will become dim and blurred. At the same time, if the magnification is too large, it will cause shaking, which is not easy to hold, and it will also cause eye fatigue, which is not conducive to observation.
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