Interesting question, and one I guess that has lots of answers. Here are two.
1. Never point the telescope directly at the Sun and try to look through it. It can permanently damage your eye.
2. Using a telescope that is too small for the task at hand e.g. trying to use a 6" telescope to look for Pluto.
They are very useful to scientists because it helps them see stars and planets better
Telescopes are the main instruments. There are many different types, such as radio telescopes, besides the "usual" optical telescopes. Other instruments such as spectrometers are very useful too.
Useful: Energy Light Sound Non-Useful: Electricity C02
becasue scientist made a discovery of FMR
WAS IT ERIKSON'S DISCOVERIES MADE OR BENEFITS OF THE WORLD?
radio telescopes
Useful is the actual production of electricity. Non-useful -- unused heat energy released into the environment.
For Earth-based telescopes this is not a particularly good idea since the ozone layer in the Earth's atmosphere absorbs some of the UV radiation. For space based telescopes, all wavelengths are useful.
Researchers use all of these: -- optical telescopes -- radio telescopes -- x-ray telescopes -- infra-red telescopes -- ultraviolet telescopes
Yes. Lenses are used for glasses (correction for eye problems), for microscopes, telescopes, and other applications.Yes. Lenses are used for glasses (correction for eye problems), for microscopes, telescopes, and other applications.Yes. Lenses are used for glasses (correction for eye problems), for microscopes, telescopes, and other applications.Yes. Lenses are used for glasses (correction for eye problems), for microscopes, telescopes, and other applications.
radio telescopes
There are telescopes used to detect radio waves and others to detect infrared radiation.