What does a telescope measure?

Answer 1

Optical telescopes magnify an optical image - something that can be seen. They have lenses that magnify the image from light waves.

they differ from Radio telescopes that detect waves other than the visual spectrum, these waves can not be "seen".

Answer 2

The telescope is an instrument that is used to study or observe objects that are a long distance away. It is an important instrument in astronomy since it helps in observation and measurement of the distance between the earth and objects in the galaxy.

Answer 3

It magnify with the help of two convex lenses the first one is which is distant from eyes are bigger (call it B) and the other one is smaller (call it S) which is nearer to our eyes, the first image of the object is made by B is inverted, here starts the work of the lens S. lets understand the small story in mid. the light is coming form infinity, (more than the focal length) so according to the law it will make its image at the focus of the B lens, the lenses are arranged like the focal length of S lens comes inside the focal length. According to the law of focal length of convex lens. of the object is below the focal length the resulting image will form on the same side of the lens, and magnified. Same thing happens in Telescope the image formed by the lens B is used by the lens Sto make a magnified virtual image on the same side of the image.

Answer 4

There are three factors that determine the magnification: the size of the mirror/lens, the focal length of the telescope and the focal length of the eyepiece.

Let D be the diameter of the lens/mirror, and f be the focal ration.

Then focal length = D * f (where * means multiply)

Let d be the focal length of the eyepiece.

Then magnification = (D * f) ÷ d

here's an example:

300mm mirror with f/10 focal ratio. This gives focal length of 300*10=3000mm

Using a 20mm eyepiece, the magnification is given by 3000 ÷ 20 = 150x

Answer 5

it's a long story