When habitancy think of telescopes, reflecting telescopes are regularly the last things that come to mind. Rather, habitancy tend to think of a level tube with lenses at whether side. This is unfortunate, since there are some ways to bend light so that it is magnified to the point where a someone on the ground can make out the features on Jupiter, the billowing gasses of a distant nebula, or the light of distant stars. In fact, if a stargazer wants to peer into the inky voids of space with a scope of manageable size, a reflecting telescope will serve them well.
Reflecting telescopes use mirrors to magnify images, allowing the image to be enlarged a few times before arrival through the eyepiece. This is simpler to implement than a standard, straight-through refracting telescope, as it allows some smaller adjustments to the image than a few, very large changes with lenses. And, by doing this with mirrors, the institute of the telescope can be made much more compact, allowing more magnifications of an image in a smaller telescope.
Telescope
In order to understand reflecting telescopes, you must begin by comprehension the fact that there are two methods of focusing light so that objects seem closer. The first formula is through lenses, which use refracting to bend light and focus it. The second formula is with mirrors, which can be shaped to reflect light in such as way that small, distant objects appear to be very close and truly visible.
There are two normal designs for reflecting telescopes: the Newtonian and the Cassegrain and its variants. The first type, Newtonian, is a very uncomplicated institute and it is very beloved with amateurs who want to home-build a telescope. In the Newtonian design, there is one large mirror at the base of a long tube, and the mirror is focused onto a flat mirror that redirects the image toward an eyepiece. This institute was originally created by Isaac Newton, and it was the first prosperous institute for a reflecting telescope.
The second type of reflecting telescope, the Cassegrain and its variants, uses two mirrors to create the image. One large mirror is set up at the base of a tube, with a smaller mirror facing it at the top of the tube. The light comes in through the top, is focused by the larger mirror, and reflected back by the smaller mirror and sent through a hole in the larger mirror and on to the eyepiece. This makes the Cassegrain telescope look like a refracting telescope, though they function very differently. However, their extreme aim is the same: to allow habitancy to see things that are very far away.
When seeing for a telescope, reflecting telescopes are some of the best that can be found. They are effective, easy to use and, in some cases, easy to build - development them the preferred choice for professional astronomers and backyard hobbyists. So, when thinking about telescopes, don't just think picture the lenses that regularly come to mind, think about considerable properties of mirrors and reflecting telescopes.
Reflecting TelescopesMy Links : Rackmount Shelves wall mount bracket tv
ไม่มีความคิดเห็น:
แสดงความคิดเห็น