Viewing The Universe

The Electromagnetic Radiation and Telescopes

What is Astronomy?

Astronomy is the study of the sky and this has a value because we have important things. It is important for the potential benefits to humans.For example, we always consume energy and the study of the sky there could be new or improve sources of Earth. This could also help by discovering new planets, stars, black holes, and even nebulas. By studying these important things, astronomers been able to find the origin of the Earth and the process involved in our solar system.


1. Identify the visible and non visible parts of the electromagnetic spectrum.

2. Compare refracting telescope and reflecting telescopes.

3. Explain how telescopes for non visible electromagnetic radiation differ from light telescopes.

Astronomy Vocabulary

Describe the Electromagnetic Spectrum

The electromagnetic spectrum is the collection of all frequencies or wavelengths of electromagnetic radiation. The visible and invisible radiation both share that. The visible radiation is visible light that is form of energy. This can be see by human eye. The invisible radiation can be detected by special instruments, not by human eye. The invisible radiation includes infrared waves, microwaves, radio waves, ultra violet rays, x rays, and gamma rays. Anything that is shorter than the violet will be invisible and anything longer than the red will also be invisible. As these two radiation are different, they also some things in common. For example, they both travel in wavelengths which produce different colors. All radiation travels at the same speed which is 300,000 km/s.
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Comparing the Refracting and Reflecting Telescope

A telescope is an instrument that collects electromagnetic radiation from the sky and concentrates it for better observation. There two different types of telescope. There is the refracting telescope and the reflecting telescope. This two gather and focuses light from distant objects and they are both optical telescopes that are use for distant objects like the sky. Although they have some similarities, they also have differences. The refracting telescope has an objective lenses and are clear objects shaped to bend light in special ways. It focuses on the light to be magnified. This lenses focuses different colors of light at different distances and that is a problem. Another problem is that it is difficult to make large lenses of the required strength and clarify. The reflecting telescope has a reflecting and curved mirror to gather and focus on light from distant objects. This can be made larger without affecting the quality of the image and this can gather more light than the refracting telescope.
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Telescope of Invisible Light

As there are refracting and reflecting telescopes there are also telescopes to detect invisible light and space based radiation. The invisible light telescope can detect gamma rays, X-rays, and even infrared rays. One problem is that Earth's atmosphere acts as a shield against many forms of electromagnetic radiation. These telescope works best at high elevations, where the sky is dry. In order to detect gamma rays, x rays, and infrared rays, you have to use the invisible light telescope.
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Telescopes for Space Based

The telescopes for space based are lunched and these telescopes detect planets, stars, and other distant objects. Theses are better in the universe because now the sky's atmosphere won't be a problem anymore. To detect the distant objects, the telescopes for space based work best.
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