In addition to seeing the distance, telescopes are also used in what aspects

Singles' Day is vicious, toot.

It can also be used for military purposes.

Military operations, archaeological research.

As the name suggests, the telescope was originally used to look far away, but some special scenes can be used to make a fire in the wild, use the telescope objective lens to disturb the sun, focus on the fire, and make a fire through the principle of Li infiltration magnifying glass.

1. It will be used as long as it is necessary to strengthen the field of vision observation. For example, tourism, watching games, bird watching, watching performances, power line inspection, water power to see the water level, forestry mountain hunting, astronomy, military and so on.

2. A telescope is an optical instrument that uses lenses or mirrors and other optical devices to observe distant objects. The light refracted through the depleted lens or the light reflected by the concave mirror makes it enter the small hole and converge for imaging, and then it is seen through a magnifying eyepiece. Also known as "clairvoyant mirror".

3. The first function of the telescope is to magnify the opening angle of distant objects, so that the human eye can see the details with smaller angular distances. The second function of the telescope is to feed the beam of light collected by the objective lens that is much thicker than the diameter of the pupil (up to 8 mm) into the human eye, allowing the observer to see faint objects that were previously invisible. In 1608, Hans Lieberch, a Dutch optician, stumbled upon the idea that he could see distant objects with two lenses, and he built the first telescope in human history.

In 1609, the Florentine native of Italy, Galizizilus Galilei invented the 40x double-mirror telescope, which was the first practical telescope to be put into scientific application.

4. After more than 400 years of development, the function of telescopes has become more and more powerful, and the distance of observation has become farther and farther.

1. About the multiple: each telescope is marked with the main parameters, such as 7 35 means that the mirror is 7 times, and the objective lens aperture is 35mm. Generally, less than 6 times is a low magnification, 6 10 times is a medium magnification, and more than 10 times is a high magnification.

In fact, the reasonable magnification of a telescope is related to the aperture of the telescope and the way of observation: if the aperture is large, the magnification can be appropriately higher, and the fixed observation with a tripod can be higher than the handheld observation. If you buy binoculars for hand-held observation, 7 10 times is enough, the highest should not exceed 12 times, otherwise the higher the multiple, the smaller and darker the observation field of view, the observation effect will decrease, especially the jitter brought by high magnification is also greatly increased, so that the observed scenery can not be stabilized, and it is difficult to observe normally.

Although there are many varieties of telescopes in various countries around the world, such as the United States and Russia, most of them are mainly 6 10 times, and some of the world's famous brands such as Zeiss and Nikon also produce telescopes with medium magnification, because a clear and stable image is the most important.

2. About the aperture: the larger the aperture, the larger the observation field of view and brightness, which is conducive to the observation in low light, but the larger the aperture, the greater the volume and weight, and the higher the cost, which can generally be selected between 30 and 50mm according to the needs.

3. About the field of view: The field of view refers to the observable horizon at a kilometer, such as 1000 93m, which means that the telescope can observe a range of 93 meters wide at a kilometer, which can also be converted into "degrees" to express 5°30. The comparison of the size of the field of view must be carried out under the condition that the aperture is similar and the multiple is the same, the key to the size of the field of view lies in the design of the eyepiece part of the prism system.

4. About coating: The function of lens coating is to reduce reflection, increase light transmittance, and improve the brightness of observation. The color of the coating is different and has nothing to do with the quality, the lighter the coating and the smaller the reflection, the better, but in recent years, there have been strong reflections on the market, bright and shining various red film, yellow film telescopes, very attractive to consumers, in fact, this inferior coating reflects and loses a lot of light, so that the color is cold and dark, the clarity decreases, and even more people call this inferior red film telescope "can be dark night vision" and "infrared night vision telescope" to deceive consumers, in fact, the real infrared night vision device is photomultiplier tube imaging, Unlike telescopes, they cannot be used during the day, are expensive and require power to work.

5. Structural materials: In order to reduce costs, most of the ordinary telescopes on the market use plastic mirror bodies and tubes, and only a few high-end products and military models use all-metal structures, which are expensive, but their durability is incomparable.

The universe is extremely mysterious to everyone on the earth, and the first time humans observed celestial bodies in the universe through a telescope began with the astronomical telescope invented by Italian physicist Galileo in 1609, which has a diameter of only centimeters, but he can already observe celestial objects in the solar system that are relatively close to the earth, such as the moon. After continuous improvement and progress by scientists, human beings finally observed Uranus at the edge of the solar system through astronomical telescopes in 1781, which is also the farthest region observed by human beings.

However, after the development of science and technology and high-end manufacturing, large-aperture refracting telescopes have also been born, refracting telescopes belong to optical telescopes, which are composed of convex lenses and concave lenses, the distance of refractive telescope observation mainly depends on the intensity of light emitted by celestial bodies in the universe and its own design caliber has a very close relationship, these telescopes can only observe the planets in the universe with light-gathering ability and stars that can emit light and other celestial bodies, which are not very suitable for deep-sky objects and nebulae. Through optical telescopes, humans can only observe various celestial objects within the Milky Way.

The other is the radio telescope, which obtains relevant information by receiving electromagnetic waves emitted by various stars in the universe. Electromagnetic waves are widespread in the universe, and their propagation mode has obvious continuity, and will not be interfered by other substances, while photons propagating in the universe are easily affected by other factors and disappear. Radio telescopes have very distinct advantages for observing deep-sky objects.

The farthest celestial object discovered by humans using radio telescopes is called GN-Z11, and according to scientists' calculations, this star appeared about 400 million years after the universe and 32 billion light-years away from the Earth.

As the expansion of the universe accelerates, photons and electromagnetic waves are no longer able to penetrate the deeper mysteries of the universe. Human beings have now begun to use neutrinos and gravitational waves to obtain more information in the universe, through these two means, human beings can observe the wavelength of gravitational waves generated when the universe is large, so that we can have a deeper understanding of the universe, and can also observe the edge of the universe and calculate the speed of the expansion of the universe.

With state-of-the-art telescopes, we would probably be able to see very far away, and we could also see some stars 13 billion light-years away from our Earth.

The farthest possible view of the universe is 13.7 billion light-years away, and the farthest possible sight of the star Andromeda is also the farthest distance that can be observed.

Using state-of-the-art telescopes, we can observe Uranus, the planet at the edge of our solar system, as far as possible.

The farthest telescope to see is the Hubble Space Telescope.

Launched on April 25, 1990, the Hubble Space Telescope orbits the Earth every 97 minutes, with a primary mirror meter, a length of meters, and a total width of 12 meters (including solar panels, a diameter of meters, and a weight of 11 tons).

The universe allows light to travel hundreds of millions of light-years. But a few millionths of a second before the light reaches the telescope on the Earth's surface, it passes through the unstable atmosphere.

And it becomes a glutinous reed paste. This is also the reason why the stars in the sky will appear to be twinkling and twinkling. The Hubble Space Telescope is a medium-sized telescope, but because it is located outside the atmosphere, light from outer space is not disturbed, absorbed or refracted by the atmosphere, so it can see farther.

Another very important factor is that the Hubble Telescope has very powerful optical telescopes and radio telescopes.

The Hubble Space Telescope mainly uses a large reflector with a concave surface and a convex surface of a meter.

Focus the light to the camera behind it for extraterrestrial observation and filming of visible light. In addition, there are various instruments that collect space rays for observation, such as infrared and gamma rays.

and microwaves, among which the NICMOS (Near-Infrared Camera and Multi-Object Spectrometer) can see the farthest images.

A telescope in Ukraine, which is said to be able to see the edge of the universe, does not know whether it is true or not.