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A small reflector telescope usually is less useful than a small refractive telescope, especially when there is plenty of light, but when one needs a large telescope and there is not much light, then the reflector telescope can be made much lighter than the refractor and usually much larger. It also can gather more light which is very useful in astronomy.
It also does not have to pass its light through thick large lenses that absorb part of the light. What is more, it can reflect almost any kind of light, from microwave radio to ultraviolet, while it is difficult to make lenses for large refractor telescopes that do not absorb some kinds of light such as infrared and ultra violet.
There also are advantages when one wants to see in more than one wavelength (colour) of light. It is difficult to prevent the different colours from separating out when passing through a large lens, but a reflector telescope does not have this problem much.
What else can I help you with?
What is a reflector telescope?
It's a telescope,that uses reflectors for you to see the objective ;D.
What are the lenses called in a reflector telescope?
The lenses used in reflector telescope is the concave lens.
What telescope collects light with a mirror?
A reflector telescope collects light with a mirror. The mirror is located at the back of the telescope and reflects the incoming light to a focal point where it is then collected by an eyepiece for viewing.
Uses lenses or mirrors to gather and focus starlight?
optical telescope
What is a reflector that uses more than one secondary mirror is called?
Reflector telescopes are cheaper to make than refractors of the same size than passing through it, only one side of the reflector telescope's Often a secondary mirror is used to redirect the light into a more convenient viewing spot.
What type of telescope is the Webb telescope?
A Cassegrain reflector
What type on telescope in the south African large telescope?
it is a reflector telescope
What kind of telescope uses a single large parabolic mirror to gather and focus starlight?
A single-mirror reflector.
What is the difference between refractor and reflector?
A refractor telescope uses lenses to gather and focus light, while a reflector telescope uses mirrors to collect and concentrate light. Refractor telescopes tend to be more expensive and have less light-gathering capability compared to reflector telescopes. Refractors are also generally easier to maintain and have a sealed tube, making them less affected by dust or dirt.
What kind of telescope are most of the large optical telescope?
Reflector.
What is a reflector that uses a secondary mirror to reflect light to the side of the telescope called?
The small mirror is a plane one reflecting a bundle of rays to the side of the main tube. That is a Newtonian reflector.
What type of reflector telescope is viewed from the same position as the refractor telescope?
The Newtonian Telescope.
