Introduction: The first function of a telescope is to magnify the open angle of distant objects, allowing the human eye to see details at smaller angular distances. A secondary function of the telescope is that a beam of light collected by the objective lens that is much thicker than the pupil diameter (maximum 8 mm) is sent to the human eye so that the observer can see previously invisible faint objects. So why can a telescope see so far away? 1. The reason why a telescope can see clearly at a distance
The large-diameter, long-focal-length convex lens in front of the telescope is called the objective lens; the small-diameter, short-focal-length lens in the back is called the eyepiece. The objective lens converges the light from the distant scene behind you into an inverted, reduced real image, which is equivalent to moving the distant scene to the imaging location at once. The inverted image of this scene falls exactly on the front focus of the eyepiece, so looking at the eyepiece is like looking at something with a magnifying glass. You can see a virtual image that has been magnified many times. In this way, in the downloaded telescope, the distant scenery looks like it is right in front of you. Like other optical instruments, telescopes of various structures have come out one after another after a long history of development. According to optical principles, it can be divided into two categories: refraction and reflection. 2. Who invented the telescope
Telescopes, commonly known as prism binoculars, are often used in military and field surveys because of their short barrels, wide field of view, and portability. Reflecting telescopes use a concave mirror as the objective lens and a convex lens as the eyepiece, and are used to observe celestial objects in the observatory. The first person to receive a patent for a telescope was the Dutch optical instrument maker Hans Slipperch, who applied for a patent in 1608. According to the Lippershey telescope, Italian scientist Galileo Galilei built one himself in 1609. The 00-300 was improved in design and was soon used to study planets and stars.
As long as there are infinite objects, a telescope can see infinity. We can see the planet hundreds of light years away without a telescope, and we can see it with a telescope. The moon is far away from us (380,000 kilometers), but we can see it with binoculars.