Reflecting telescopes have many advantages over refracting telescopes. Mirrors don’t cause chromatic aberration and they are
easier and cheaper to build large
. The are also easier to mount because the back of the mirror can be used to attach to the mount.
Which is better reflecting or refracting telescope?
Each telescope has its own advantage, for instance the
refractor is better for observing the planets
and the moon and the reflector for deep-sky objects (e.g. galaxies). However, the refractor suffers from what is known as chromatic aberration.
Do astronomers use reflecting or refracting telescopes?
A
refractor
uses lenses within a tube to refract (bend) light. It’s the type of long telescope which you might imagine old-time astronomers, like Galileo, using. Reflectors, on the other hand, use mirrors instead of lenses to reflect light. Most modern observatories use reflectors because their telescopes are so huge.
What are the advantages and disadvantages of a reflecting telescope?
| Pros Cons | Large mirror = better light collecting capacity No chromatic aberrations (colored fringes around stars) Relatively low cost Optical quality often disappointing Collimation and mirrors cleaning processes Open tube = high vulnerability to dust, humidity..etc Bulky and heavy |
|---|
What advantage does a reflecting telescope have over a refracting telescope?
Reflecting telescopes have many advantages over refracting telescopes. Mirrors don’t cause chromatic aberration and they
are easier and cheaper to build large
. The are also easier to mount because the back of the mirror can be used to attach to the mount.
What are the disadvantages of a refracting telescope?
- Very high initial cost relative to reflector.
- A certain amount of secondary spectrum (chromatic aberration) unavoidable (reflector completely free of this) The colours cannot focus at one point.
- Long focal ratios can mean that the instrument is cumbersome.
What type of telescope can work 24 hours a day and even be used in the rain?
Hubble
, the observatory, is the first major optical telescope to be placed in space, the ultimate mountaintop. Above the distortion of the atmosphere, far far above rain clouds and light pollution, Hubble has an unobstructed view of the universe.
What are 3 disadvantages of a reflecting telescope?
Reflecting telescopes have a few disadvantages as well. Because they are normally open, the mirrors have to be cleaned. Also,
unless the mirrors and other optics are kept at the same temperature as the outside air, there will be air currents inside the telescope that will cause images to be fuzzy
.
What is the biggest advantage of a reflecting telescope?
The main advantage is reflector telescope
can escape from chromatic aberration because wavelength does not
effect reflection. The primary mirror is very stable because it is located at the back of the telescope and can be support in the back. More cost effective than refractor of similar size.
How big was the mirror in Herschel’s telescope?
William Herschel’s 40-foot telescope, also known as the Great Forty-Foot telescope, was a reflecting telescope constructed between 1785 and 1789 at Observatory House in Slough, England. It used a
48-inch (120 cm) diameter primary mirror with a 40-foot-long
(12 m) focal length (hence its name “Forty-Foot”).
Which of the following is the biggest disadvantage of putting a telescope in space?
Which of the following is the biggest disadvantage of putting a telescope in space?
Space telescopes are much more expensive than similar ground-based telescopes.
What is the largest mirror used in a modern day telescope?
As of 2013, the largest reflecting telescope
Why do astronomers prefer reflecting telescopes?
A telescope is a devise designed to collect as much light as possible from some distant source and deliver it to a detector for detailed study. Astronomers prefer reflecting telescopes
because larger mirrors are lighter and much easier to construct than large lenses
, and they also suffer from fewer optical defects.
What are 2 problems with refracting telescopes?
The two problems with refracting telescopes are
a chromatic aberration and spherical aberration
.
What type of telescope is best for viewing planets?
Both
refractor and reflector telescopes
How far can a refracting telescope see?
even small telescopes. To put that in perspective, you can see an object that is over 6,750,000,000,000,000,000 miles from us and yet a small
60mm
refractor telescope can view it given clear skies and low light pollution.
