Astronomy 1021 Chapter Notes - Chapter 5: Dangerous Visions, Primary Mirror, Incandescent Light Bulb
10 Dec 2015
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Document Summary
Spectrum the colors of light are spread out in horizontal rows. Isaac newton was the first to demonstrate that the colors seen when passing white light through a prism actually came from the light, not the prism. Visible light is only a tiny part of the electromagnetic spectrum. Light is often known as electromagnetic radiation. Wave- something that can transmit energy without carrying material along with it. Frequency i. e. number of times a rope moves up and down each second. We can"t see waves of light but we can tell it moves in waves due to its effect on matter. Light electromagnetic wave because it can interact with both electrically charged particles and magnetic fields. Speed of light 300,000 km/s, speed = wavelength x. Microwaves in-between infrared and radio waves. The longer the wavelength the lower the frequency and. Visible light wavelength 400 - blue/violet, 700 red. Slightly longer wavelengths infrared (beyond red end frequency vice versa of rainbow)
