"Distance measures" are used in physical cosmology to give a natural notion of the distance between two objects or events in the universe. They are often used to tie some "observable" quantity to another quantity that is not "directly" observable, but is more convenient for calculations . The distance measures discussed here all reduce to the common notion of Euclidean distance at low redshift.
In accord with our present understanding of cosmology, these measures are calculated within the context of general relativity, where the Friedmann–Lemaître–Robertson–Walker solution is used to describe the universe.
There are a few different definitions of "distance" in cosmology which all coincide for sufficiently small redshifts. The expressions for these distances are most practical when written as functions of redshift z , since redshift is always the observable. They can easily be written as functions of scale factor a=1/ , cosmic t or conformal time \eta as well by performing a simple transformation of variables. By defining the dimensionless Hubble parameter
and the Hubble distance d_H = c/H_0 , the relation between the different distances becomes apparent. Here, \Omega_m is the total matter density, \Omega_\Lambda is the dark energy density, \Omega_k = 1-\Omega_m-\Omega_\Lambda represents the curvature, H_0 is the Hubble parameter today and c is the speed of light. The following measures for distances from the observer to an object at redshift z along the line of sight are commonly used in cosmology:
Wiz Science™ is "the" learning channel for children and all ages.
SUBSCRIBE TODAY
Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK.
Background Music:
"The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library.
This video uses material/images from https://en.wikipedia.org/wiki/Distanc...), which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/b... . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/b... . To reuse/adapt the content in your own work, you must comply with the license terms.
Wiz Science™ is "the" learning channel for children and all ages.
SUBSCRIBE TODAY
Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK.
Background Music:
"The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library.
This video uses material/images from https://en.wikipedia.org/wiki/Distanc...), which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/b... . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/b... . To reuse/adapt the content in your own work, you must comply with the license terms.
general relativity for babies Distance measures (cosmology) - Video Learning - WizScience.com | |
| 1 Likes | 1 Dislikes |
| 145 views views | 27.4K followers |
| Education Creative Commons Attribution licence (reuse allowed) | Upload TimePublished on 9 Sep 2015 |
Related keywords
luminosity gaming,chemistry jobs,galaxy a10,redshift sports,engineering management,luminosity hltv,distance sensor,expansion of the universe hubble,science magazine,physics formula sheet,engineering for kids,scale factor gyro,misconceptions about hiv,redshift 2.6 full,physics jobs,general relativity for mathematicians,universe 25,euclidean domain,quasar chicha,universe today,engineering design process,engineering colleges,scale factor of universe,physics for dummies,biology degree jobs,misconceptions in tagalog,universe quotes,euclidean division,engineering notebook,physics formulas,scale factor value,euclidean distance matrix python,luminosity in tagalog,chemistry for dummies,quasar 3c273,engineering games,galaxy a30,speed of light iron maiden,misconceptions about marketing,galaxy para siempre,galaxy s8,luminosity of the flame,galaxy s9,chemistry calculator,luminosity mask,cnblue,universe meaning,distance relationship,technology addiction,technology companies,universe of obligation,euclidean group,galaxy a20,biology sat subject test,speed of light stratovarius,scale factor calculation,cmb اكتوبر,universe tickets,science museum london,chemistry final exam,redshift pricing,galaxy a50,chemistry textbook,distance between two points,euclidean distance matlab,biology regents curve 2019,distance vector,general relativity for dummies,science fiction lyrics,scale factor math is fun,science daily,dark energy screens,galaxy note 10,scale factor drawing,redshift blender,cnbc arabia كلام اسواق,technology meme,dark energy battery,general relativity an introduction for physicists,biology regents,chemistry set,cnbc news,speed of light omd lyrics,universe definition,biology regents review,science fiction,speed of light letra en español,speed of light iron maiden letra español,physics memes,expansion of the universe and entropy,galaxy a70,euclidean distance matrix,biology corner,biology topics,luminosity definition science,misconceptions about psychology,euclidean rhythms,cmb مطار,luminosity of elan enterprise,physics equations,quasar 95,physics calculator,technology in education,universe age,distance lyrics,technology stocks,misconceptions about philosophy,cnbc arabia jobs,euclidean algorithm,cnbc news arabic,chemistry table,physics jokes,engineering careers,luminosity unit,science advances,general relativity paper,technology stack,luminosity app,science direct elsevier,biology major jobs,cmbrowser,physics definition,science bits,physics games,misconceptions on entrepreneurship,expansion of the universe is accelerating,biology jokes,physics terms,general relativity books,cnbc arabia gold,chemistry memes,luminosity sunscreen,galaxy j6,dark energy definition,chemistry definition,galaxy j4,quasar raas,technology credit union,speed of light in vacuum,expansion of the universe worksheet,cnb,quasar chicha raas,expansion of the universe timeline,speed of light mph,general relativity pdf,quasardb,universe sandbox,dark energy pre workout,general relativity conference 2019,redshift c4d,misconceptions synonym,sciencealert,universe tattoo,lumosity games,= 299792458 m / s,expansion of the universe graph,universe of stories,distance formula,quasars paris,science direct,galaxy j4 core,expansion of the universe pdf,euclidean norm,euclidean distance online,engineering paper,general relativity for mathematicians pdf,technology jobs,engineering toolbox,euclidean distance in r,biology major,sciences po,cnb تتبع,engineering salary,euclidean circles v2,physics gre,scale factor 1/8,euclidean distance,distance matrix,expansion of the universe worksheet answers,dark energy equation,general relativity definition,speed of light tab,general relativity equation,dark energy vs dark matter,engineering notation,science hub,galaxy s10 precio,expansion of the universe activity,cnbc,redshift aws,science kombat,quasar science,speed of light in km/h,luminosity csgo,chemistry review,scale factor ssp,euclidean circles,general relativity wald,distance between cities,technology definition,luminosity csgo gosu,misconceptions about depression,galaxy s10,redshift spectrum,technology stores near me,general relativity for babies pdf,chemistry reference table,quasar 1,quasar 2,universe background,physics classroom,physics regents,dark energy creations,chemistry regents,quasar khanh,redshift documentation,technology news,euclidean norm latex,luminosity of stars,dark energy charger,redshift astronomy,euclidean space,misconceptions in science,engineering manager salary,distance game,distance christina perri,general relativity and gravitation,distance between two coordinates,misconceptions about the big bang,technology high school,redshift cinema 4d,speed of light stratovarius tab,chemistry equations,distance and time,dark energy facts,galaxy a7,galaxy buds,redshift 2.6 crack,universe sandbox free,technology quotes,redshift mac,expansion of the universe experiment,expansion of the universe vs speed of light,expansion of the universe conclusion,euclidean distance python,misconceptions in mathematics,physics girl,scale factor pdf,distance education,galaxy s10e,engineering internships,biology regents curve,general relativity theory,engineering explained,speed of light in meters per second,misconceptions about mental health,quasar borderlands 2,speed of light iron maiden lyrics,engineering technology,scale factor of 1/2,biology final exam,dark energy survey,biology current events,distance and displacement,distance software,universe synonym,redshift cinema 4d r20,biology degree,cnbc arabia live,chemistry bench ark,science research,expansion of the universe gif,dark energy spectroscopic instrument,speed of lightning,engineering technician,misconceptions about physical activity,chemistry in spanish,chemistry puns,chemistry formulas,speed of light lyrics,cnbc live,scale factor and similarity,science en español,technology background,cnbc عربية وظائف,technology synonym,scale factor matrix,luminosity of sun,scale factor practice,technology in the classroom,physics textbook,speed of light km/s,expansion of the universe in the quran,engineering jobs near me,luminosity definition,galaxy m10,euclidean action,engineering majors,cmb airport,chemistry pick up lines,misconceptions about art,misconceptions about health,euclidean distance qgis,misconceptions about communication,expansion of the universe rate,misconceptions about africa,speed of light in air,biology of belief,quasar def,dark energy book,scale factor 3/16,distance naruto,redshift autodesk,general relativity wald pdf,redshift vs octane,dark energy power bank,luminosity meaning,redshiftgui,dark energy minneapolis,galaxy a80,galaxy note 8,chemistry lab equipment,expansion of the universe faster than light,euclidean geometry,expansion of the universe theory,speed of light letra,physics reference table,science of the total environment,dark energy is an unexplained force that is causing,biology jobs near me,science fiction movies,biology textbook,scale factor 中文,quasar framework,scale factor cosmology,technology readiness level,luminosity formula,physics today,dark energy manipulation,universe wallpaper,misconceptions about quantitative research,science news,dark energy tech,misconceptions about counseling,science traduccion,dark energy and dark matter,universe towing,luminosity in a sentence,quasar marvel,general relativity action,universe appliance,scale factor tcp,engineering jobs,scale factor of 2,cnbc awaaz live tv share market,physics news,biology careers,quasar light,universe pictures,distance love,chemistry jokes,speed of light in km,technology insurance company,redshift cinema 4d mac,physics subject test,quasar concept,misconceptions meaning,dark energy star,science citation index,quasar rat,speed of light shrine,cnbc عربية,engineering degrees,technology etf,biology definition,expansion of the universe equation,technology student association,quasar pulsar,quasar solutions,scale factor sap2000,biology jobs,general relativity robert wald pdf,redshift linux,speed of light iron maiden tab,distance from,redshift benchmark,cnbc عربية تويتر,general relativity exercises,redshift c4d r20,cmbyn,distance between,luminosity photoshop,expansion of the universe lecture tutorial answers,universe dota,distance over time,scale factor question,expansion of the universe for dummies,universe toyota,dark energy pokemon,
Không có nhận xét nào:
Đăng nhận xét