ASTR 1101 Study Guide - Midterm Guide: Metallic Hydrogen, Moons Of Uranus, Refraction
Document Summary
What is a wave: a wave is how energy moves from one place to another, a wavelength is measured crest to crest. Tells you energy, frequency, everything you need to know about the wave. Other wave properties: waves can add (interference, waves meet at crest; you get a big wave, waves meat at crest and trough; they cancel out. X-rays: mechanical waves require mediums but electromagnetic waves do not. If energy goes up, the wavelength goes down: frequency~ 1/p. Electrical outlet: 60 hz (hz means going back and forth per second: radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, gamma, large to smallest wavelengths so less to more energy. Blackbody spectrum: an object which absorbs all incident light and reemits all light according to its temperature, temperature ~ 1/ p, flux~r2t4. Radius and temperature: we emit our energy in the infrared because we are relatively cold. Our peak wavelength would be in the infrared and would coordinate to.
