domingo, 15 de agosto de 2010

introduction

Actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house andradio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwavesinfrared andultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays.
Here are the different types of radiation in the EM spectrum, in order from lowest energy to highest.

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