What kinds of problems occur with optical telescopes?

What kinds of problems occur with optical telescopes?

The disadvantage is that the smaller optical telescopes cannot gather as much light, so they are not very powerful if you seek more distant objects like galaxies and nebulae.

What are disadvantages of optical 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.

Why is the atmosphere bad for telescopes?

Scintillation effects are worse for stars near the horizon where refraction effects are greater, leading to dispersion of light. Turbulent cells of air in the atmosphere limit the actual resolution of telescopes in the optical wavebands to typically no better than that obtained by a 20-cm telescope.

What is one disadvantage of using optical astronomy to study the universe?

Optical telescopes observe visible light from space. Small ones allow amateurs to view the night sky relatively easily but there are very large optical telescopes sited around the world for professional astronomers to use. Optical telescopes on the ground have some disadvantages: they can only be used at night.

Which one is the disadvantage of internal focusing telescope?

1. The internal lens between the eyepiece and objective reduces the brightness of the image. 2. Maintenance and repair are difficult since everything is inside.

What are 2 problems with refracting telescopes?

The two problems with refracting telescopes are a chromatic aberration and spherical aberration.

What problems do space based telescopes solve?

Space-based telescopes like Hubble get a much clearer view of the universe than most of their ground-based counterparts. They’re also able to detect frequencies and wavelengths across the entire electromagnetic spectrum.

Is the atmosphere good or bad for astronomers trying to use telescopes?

Our windy, weather-ridden atmosphere is almost always full of slight temperature irregularities, and when you look through a telescope you see their effect magnified. Much of the “atmospheric seeing” problem, however, arises surprisingly close to the telescope, where you can take steps to reduce it.

How does the atmosphere affect astronomy?

Earth’s atmosphere has an effect on astronomical observations. While the atmosphere shields us from harmful radiation from the sun, it also reflects most radiation. This makes observations at some wavelengths weaker.

What are some disadvantages to using visible light to study objects in the universe?

Gamma-ray observatories Not only are gamma-rays blocked by Earth’s atmosphere, but they are even harder than X-rays to focus. In fact, so far, there have been no focusing gamma-ray telescopes. Instead, astronomers rely on alternate ways to determine where in the sky gamma-rays are produced.