Study Guides (248,366)
United States (123,346)
Astronomy (46)
ASTR 1101 (32)
All (30)
Midterm

Astronomy 1101 Test 3

6 Pages
126 Views
Unlock Document

Department
Astronomy
Course
ASTR 1101
Professor
All Professors
Semester
Winter

Description
4Astronomy1101Test3ITheDopplerEffectAWhatisitThechangeinwavelengthofsoundorelectromagneticradiationduetotherelativemotionalongthelineofsightbetweentheobserverandthesourceLineofsightmovementiscalledradialmotionCrossthelineofsightiscalledtransversemotionExamplesweatherradarradargunairportradarBHowitWorksWhensourceandobserveraremovingtowardeachotherwavesgetcompressedWavelengthgetsshorterandthelightbecomesbluerWhensourceandobserveraremovingawayfromeachotherwavesgetstretchedoutWavelengthgetslongerandthelightbecomesredderNochangewhenmotionisupanddownCDopplerShiftEquationv is positive for sources that are redshiftedv is negative for sources that are blueshiftedIITelescopesATwoMainTypesRefractinguseslensestogatherlightReflectingusesmirrorstogatherlightBRefractingTelescopeLightslowsdownasitpassesthroughdifferenttypesofmaterialglasswateretcThischangeinspeedcausesittobendProblemswiththetelescopeoItisdifficulttomakeverylargeglasslensesoThisputsalotofweightattheendofthetubeCFunctionsofaTelescopeGatherlightseefaintdistantobjectsResolvefinedetailMagnifyBIGGERISBETTERmorelightisgatheredsofinerdetailoTelescopesizereferstothediameteroftheprimarymirrororlensOuratmosphereblockssomeelectromagneticradiationDResolvingPowerResolvingpowerreferstohowfineofadetailyoucanseeThesmallerthedetailthebetteryourangularresolutionIncreasingthesizeofyourtelescopeimprovesyourangularresolutionAgainbiggerisbetterEWhydostarstwinkleTheEarthsatmosphereisturbulenthotandcoldairisconstantlymovingaroundAslightfromastarpassesthroughthemovinglayersthelightbouncesaroundonitswaytoyoureyeThisbouncingofthelightiswhatmakesthestarstwinkleFBenefitsofTelescopesinSpaceWecanseeallwavelengthsItisverycoldinspace
More Less

Related notes for ASTR 1101

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit