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The table used by researchers to classify, analyze and explain the various forms of electromagnetic radiation called the electromagnetic spectrum. The electromagnetic waves can travel through space, although the sound waves need a way to cross. Most of the radiation is not harmful, much more focused UV radiation such as X-rays and gamma rays can be particularly dangerous. Scientists studying the electromagnetic theory in terms of our world to ensure that radiation from computers, cell phones and power lines will not harm us.

The electromagnetic spectrum consists of seven types of radiation. highest to lowest, are gamma rays, X rays, ultraviolet, visible, infrared, microwaves and radio waves. Radio waves have the longer wavelength, can be as long as a football field. The electromagnetic waves are invisible to the naked eye but which transmit television signals, cell phones, radio and wireless Internet. The radio waves are also emitted by stars and gas in space. Microwaves can not be seen and have a wavelength slightly short, send the sound through the phone, doing the work of Doppler weather radar and filter through space, a light background. When talking about Big Bang theory or the study of the astronomers, the Milky Way is often referred to microwaves.

A relatively low radiation is contained in an infrared wavelength, which is the third longest wave in the electromagnetic spectrum. The sun's heat is infrared in nature. An electromagnetic pulse Infrared is used by snakes to hunt warm-blooded animals in the dark. We use infrared heat sensors in military tactics, hunting, and even stop smugglers dedicated illegally copy movies in theaters. Located between the star dust is illuminated by infrared wavelengths.

After microwave radio and infrared visible light "refers to what you see electromagnetic spectrum. Types of electromagnetic fields to the visible light are the sun, reflected light, fireflies, light bulbs, rainbows, stars and fast-moving particles. When we have sun burned, we see the effects of ultraviolet rays, but we can not really see. Carcinogenic rays are generally protected by the ozone layer. The damage may occur through holes in the ozone layer or prolonged exposure. UV rays are also emitted by stars and other objects are extremely hot.

Why is our existence depends as the electromagnetic spectrum? In addition to adding some of the technologies most important of our time, the earth receives its energy from the sun, carried by light, maintaining a prosperous life. Instead of being nothing more than frozen rocks uninhabitable like many other planets, our earth photosynthesis, water cycle and atmosphere. These electromagnetic waves deserve our thanks on many levels.

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