Electromagnetic Waves & the Electromagnetic Spectrum. Electricity can be static, like what holds a balloon to the wall or makes your hair stand on end. . Magnetism can also be static like a refrigerator magnet. But when they change or move together, they make waves - electromagnetic waves.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
At this speed they can go around the world 8 times in one second.
Notice the wavelength is kilometres per second (the speed of light).
long (Radio waves) and gets shorter (Gamma Rays)
Used in microwave ovens. it to
(Radio Detection and Ranging)
Therefore people give off infrared rays. spectrum of light—infrared light waves—to change channels on your TV.
Heat lamps give off infrared waves.
Thermogram—a picture that shows regions of different temperatures in the body. Temperatures are calculated by the amount of infrared radiation given off.
Bones and teeth spectrum of light—infrared light waves—to change channels on your TV. absorb x-rays. (The light part of an x-ray image indicates a place where the x-ray was absorbed)