AST101H1 Midterm: second midterm notes

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Clifford Orwin

Document Summary

White light-mixture of basic colored light in equal proportions. Emission-eg. light bulb,energy of light comes fr electricity potential energy. Absorption-eg. cover light bulb w/ hand,hand absorbs some light&this energy makes hands warm. Scattering-random direction wave-wavelength, frequency, period. c=f*wavelength, particles-thing wave-pattern revealed by p. Light-electromagnetic waveconsists of individual photons characterized by wavelength,frequency& energy. speed is constant. -both wave&particles. Phases-solid,liquid,ice. -chemical bonds stronger-tighter-sold , if weaker, then liquid, gas. Plasma-type of gas which atoms have become ionized. eg. sun is made of plasma/hot gas. Earth core is solid cuz of pressure, tho its temperature is high. Energy level transition-as electron rise fr low energy level to higher one/fall fr high to low. Spectroscopy-obtain spectrum&read info. display graphs showing intensity at diff. Emission line spectrum-low density clouds emits light only at specific wavelengths. Atoms in cloud collide bump electrons to high energy level,then fall back. &loses energy by emitting photon of light at specific wavelength.