You can make a galileo telescope at a very low cost. Buy a spectacle lens with a larger diameter and focal length from a stationery store as an objective lens and a lens with a smaller focal length as an eyepiece. Put two lenses in a cardboard tube with glue and slots, and then make a simple base, so that a telescope that can see the mountains on the moon, the stars in the Milky Way and Jupiter's satellites is finished. Think about it, Galileo discovered it with this man. But remember, don't look directly at the sun with a telescope, lest the high temperature burn your eyes, unless you have the Monkey King's eyes. Galileo's refracting telescope has an annoying disadvantage, that is, it produces "false colors" around bright objects. The crux of "false color" is that the so-called "white light" is not white light at all, but a mixture of all colors that make up the rainbow, from red to purple. When the light beam enters the objective lens, it refracts, and the degree of refraction of light of various colors is different, so the focus of imaging is different, resulting in blur.
16 1 1 year, another astronomer, Kepler, used two biconvex lenses as the objective lens and eyepiece respectively, which significantly improved the magnification. Later, people called this optical system Kepler telescope. Refractive telescopes are still used in these two forms. However, the problem of "false color" has not been solved.
Lipschi is not an astronomer. He never wanted to aim his new equipment at the sky. But soon, the news about his discovery spread. Fortunately, Professor Galileo of the University of Padua in Italy learned about it. Galileo quickly made a refracting telescope. He used a plano-convex lens as the objective lens and a concave lens as the eyepiece. The light from the object under study shines on a glass lens of the telescope's objective lens, which refracts and focuses the light on a point called focus, and forms an image of the luminous body at this point. This image is magnified by the lens of the eyepiece and enters the human eye.
You can make a galileo telescope at a very low cost. Buy a spectacle lens with a larger diameter and focal length from a stationery store as an objective lens and a lens with a smaller focal length as an eyepiece. Put two lenses in a cardboard tube with glue and slots, and then make a simple base, so that a telescope that can see the mountains on the moon, the stars in the Milky Way and Jupiter's satellites is finished. Think about it, Galileo made a series of amazing discoveries with such a telescope. But remember, don't look directly at the sun with a telescope, lest the high temperature burn your eyes, unless you have the Monkey King's eyes. Galileo's refracting telescope has an annoying disadvantage, that is, it produces "false colors" around bright objects. The crux of "false color" is that the so-called "white light" is not white light at all, but a mixture of all colors that make up the rainbow, from red to purple. When the light beam enters the objective lens, it refracts, and the degree of refraction of light of various colors is different, so the focus of imaging is different, resulting in blur.
16 1 1 year, another astronomer, Kepler, used two biconvex lenses as the objective lens and eyepiece respectively, which significantly improved the magnification. Later, people called this optical system Kepler telescope. Refractive telescopes are still used in these two forms. However, the problem of "false color" has not been solved.