PES 105 Light_ General Properties

PES 105 Light_ General Properties - 1/15/12 PES 105 Light:...

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Unformatted text preview: 1/15/12 PES 105 Light: General Properties PES 105 Fall 2001 P e io General Astronom I Lec e Ne Lec e Lecture Notes: Light: General Properties, Temperature e : Chap e 3, Sec ion 3.1 and 3.2 Introduction M ch of he info ma ion e ge in a onom i ca ied b "ligh " Wha info ma ion doe "ligh " con ain ? 1. 2. 3. 4. loca ion of ligh in he k ..... gi e po i ion of a plane , moon, o a colo ..... gi e empe a e, peed and di ec ion of mo ion, chemical compo i ion b igh ne ..... gi e di ance, compo i ion, pe iod of mo ion (f om change ) i e of ligh ..... gi e i e and di ance info ma ion Vi ible ligh , adio a e , X- a ... a e all diffe en fo m of he ame hing => all "elec omagne ic adia ion" Properties of Light (electromagnetic radiation) peed of ligh in emp pace i con an c = 3 108 m/ = 670 billion mph hi fini e peed ha a eal effec on info ma ion ca ied b ligh i ake 1 1/4 econd fo ligh o each f om he moon i ake 8 1/3 min e fo ligh o each f om he n i ake 4 1/3 ea fo ligh o each f om he nea e a Think of ligh a a a e www.uccs.edu/ tchriste/courses/PES105/105lectures/105leclight.html 1/5 1/15/12 PES 105 Light: General Properties wave le ngth = he di a ce be ee a ece he a e e g h i i dica ed b he G ee fre que nc = We a be f a ece He e i a LINK e e e ci e e ec d a i g a e ha each a e i color i de e i ed b a e i g a he a e a ee gh( a age f a ca e b " " i he fig e ab e. i eed i hi fig e. fe e c ) he U i e i ha de c ibe he a e a e f igh a d gi e de a di g. Spectrum and more properties Whe The e di ide d a he f igh a diffe e e f e ec ag e ic adia i b a e e g h (c ), e ge a "s pe ctrum". a e e g h i ca ed "s pe ctros cop ". I i a e ef . RED . . . . . BLUE RADIO INFRARED VISIBLE ULTRAVIOLET X- RAYS GAMMA RAYS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > f e e c - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > high g <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - a e e g h <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - h See Fig e 3.5 i he e b fa Vi ib e igh i ac a a He e i a ae e de ai ed di c i i he de c i i a f he f he ec ec fa ec . He e i a i he fig e. . www.uccs.edu/ tchriste/courses/PES105/105lectures/105leclight.html . 2/5 1/15/12 PES 105 Light: General Properties W T . LINK. Wh do we s e e "vis ible " light ? 1. S 2. E 3. H ' . Is light re all a wave ? -" - - " ' Ene rg carrie d b light de pe nds on wave le ngth (color, fre que nc ): => => M , E= : / E , , . Temperature 55 ( 50- 51 W 2 .) K Fahre nhe it Ce ls ius Ke lvin - 460 - 321 - 196 77 0 273 70 22 295 212 100 373 10,340 ) 0 32 ( - 273 5727 6000 H . (R .J www.uccs.edu/ tchriste/courses/PES105/105lectures/105leclight.html 3/5 1/15/12 PES 105 Light: General Properties Calc la e .A .A ****** Tempe a . K e Con e ion Calc la o C F R Re e Calc la e Ligh and Hea A . = = =" " P : 1. 2. 3. ( S ) 3.6 !H . ............... S ................... , ...... ( - ) I H H T www.uccs.edu/ tchriste/courses/PES105/105lectures/105leclight.html . . . 4/5 1/15/12 PES 105 Light: General Properties Do no conf e hi e mi e d ligh plane , e c. P e io i h he re fle c e d ligh hich allo o e e o ee o he people, Lec e - - - INDE OF LECTURES - - - Ne Lec e RETURN o Lec e No e O line la pda e: 9/20/101 www.uccs.edu/ tchriste/courses/PES105/105lectures/105leclight.html 5/5 ...
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This document was uploaded on 01/15/2012.

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