What are the two basic types of telescopes What are their advantages and disadvantages?
There are two basic types of telescopes, refractors and reflectors….Disadvantages
- All refractors suffer from an effect called chromatic aberration (“color deviation or distortion”) that produces a rainbow of colors around the image.
- How well the light passes through the lens varies with the wavelength of the light.
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 are the advantages and disadvantages of ground based telescopes?
Compared to space-based telescopes, ground-based telescopes have much to offer. They can be built bigger and for less money. They’re easier to maintain and upgrade. Practically speaking, they also have a much lower risk of being damaged by one of the 500,000 pieces of debris flying through the cosmos—or space junk.
What are three advantages of reflecting telescopes?
List three advantages of reflecting telescopes over refractors.
- Allows all colors to be focused.
- Mirrors can be very large.
- Glass problems do not affect light entering in.
What are the advantages and disadvantages of refracting telescopes?
Advantages and Disadvantages of Refracting Telescopes:
- Superior revolving power per inch of aperture.
- Superior performance in inferior conditions – image steadier.
- Not reflections or interruption of light path.
- Near permanent optical alignment – minimum maintanance.
What are the advantages of a CCD over a photograph?
CCDs have two major advantages over the photographic plate: the capability to directly record photons with an efficiency of 80–90\% and to store data electronically. The stored data can then be processed with a computer.
What are the disadvantages of telescopes?
Disadvantages:
- 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 are some disadvantages of space based telescopes?
Disadvantages. Space telescopes are much more expensive to build than ground-based telescopes. Due to their location, space telescopes are also extremely difficult to maintain. The Hubble Space Telescope was serviced by the Space Shuttle, but most space telescopes cannot be serviced at all.
What are three advantages of a reflecting telescope over a refracting telescope?
What are the disadvantages of optics in a telescope?
The optics provide the advantages of both lenses and mirrors, so they make a great all purpose telescope. They may suffer a slight loss of light because of the positioning of the secondary mirror. Also catadioptrics may suffer from image shift, or a jump in focus, due to the primary mirror being moved when focusing.
What are the advantages of a catadioptric telescope?
Most catadioptrics are extremely compact and portable. The optics provide the advantages of both lenses and mirrors, so they make a great all purpose telescope. They may suffer a slight loss of light because of the positioning of the secondary mirror.
What are the advantages of using a reflector telescope?
The reflector telescopes are fairly compact and portable which are great for transportation and storage , They are also generally more affordable ( particularly as the mirrors are cheaper to produce than the lenses ) , And the mirrors can produce less optical aberrations than the lenses .
What are the advantages of optical astronomy?
The gratification of seeing an object through an eyepiece is one advantage to optical astronomy. Optical telescopes can provide visible images through the eyepiece, and even more stunning images are captured on CCD cameras.