ASTR 3 Lecture Notes - Lecture 7: Atomic Orbital, Photon, Emission Spectrum
Document Summary
Wavelength and frequency: important variables in describing light. Ultraviolent is shorter in wavelength than visible light, which is also shorter than infrared. (cid:28665)(cid:28677)(cid:28664)(cid:28676)(cid:28680)(cid:28664)(cid:28673)(cid:28662)y, (cid:28663)(cid:28664)(cid:28662)(cid:28677)(cid:28664)(cid:28660)(cid:28678)(cid:28664) (cid:28682)(cid:28660)(cid:28681)(cid:28664)(cid:28671)(cid:28664)(cid:28673)(cid:28666)(cid:28679)(cid:28667) (cid:28603)(cid:28682)(cid:28667)(cid:28664)(cid:28673) (cid:28678)(cid:28675)(cid:28664)(cid:28664)(cid:28663) (cid:28663)(cid:28674)(cid:28664)(cid:28678)(cid:28673)"(cid:28679) (cid:28662)(cid:28667)(cid:28660)(cid:28673)(cid:28666)(cid:28664)(cid:28604)(cid:28621) Increase c=frequency * wavelength. (cid:28631) (cid:28637)(cid:28647) (cid:28648)(cid:28636)(cid:28633) (cid:28647)(cid:28644)(cid:28633)(cid:28633)(cid:28632) (cid:28643)(cid:28634) (cid:28640)(cid:28637)(cid:28635)(cid:28636)(cid:28648) (cid:28648)(cid:28636)(cid:28629)(cid:28648) (cid:28632)(cid:28643)(cid:28633)(cid:28647)(cid:28642)"(cid:28648) (cid:28631)(cid:28636)(cid:28629)(cid:28642)(cid:28635)(cid:28633) (cid:28634)(cid:28643)(cid:28646) (cid:28629)(cid:28642)y form of light, including visible and invisible ones, such as radio waves. Thermal radiation (blackbody radiation): normal things absorb light and reflect it. But a (cid:28630)(cid:28640)(cid:28629)(cid:28631)(cid:28639) (cid:28630)(cid:28643)(cid:28632)y (cid:28632)(cid:28643)(cid:28633)(cid:28647)(cid:28642)"(cid:28648) (cid:28646)(cid:28633)(cid:28634)(cid:28640)(cid:28633)(cid:28631)(cid:28648), the light we see is all generated by itself. The light emitted from an opaque, non- reflective object tells us its temperature. The higher the temperature, the more active the particles are. Temperature measures the amount of random motion in an object. 0 kelvin: the object is so cold that no particles move, unachievable now. 0 degrees celcius=273 k. 100 celcuis: 373 k. ppt2. 4: the colors represent the intensity of the body temperature. Most opaque things are similar with a blackbody.
