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Line 9: − + − ==Starlight Problem For the Big Bang Theory== − The [[starlight problem]] is an argument against the [[Big Bang Theory]] which theorizes a universe of billions of years old. <ref>http://www.answersingenesis.org/creation/v25/i4/lighttravel.asp</ref> The [[creation science]] organization [[Answers in Genesis]] has stated the following regarding the starlight problem for the Big Bang Theory and the work of [[Charles W. Misner]] is cited who published his work in ''[[Physical Review Letters]]'': − {{cquote|The problem is this: even assuming the big bang timescale, there has not been enough time for light to travel between widely separated regions of space. So, how can the different regions of the current [cosmic microwave background] CMB have such precisely uniform temperatures if they have never communicated with each other? This is a light-travel–time problem.<ref>http://www.answersingenesis.org/creation/v25/i4/lighttravel.asp</ref>}} − +
Paragraph was copied from the starlight problem article and only discussed the side AiG would like to see discussed. Also rephrase of "see also" phrase.
The speed of light is slower in any medium which is not a vacuum, and varies from medium to medium. This variation gives rise to (as a result of [[quantum mechanics]], particularly the concept of a path of least action) the phenomenon of [[refraction]]. When a charged particle exceeds the speed of light in the medium in which it is travelling, it emits [[Cherenkov Radiation]].
The speed of light is slower in any medium which is not a vacuum, and varies from medium to medium. This variation gives rise to (as a result of [[quantum mechanics]], particularly the concept of a path of least action) the phenomenon of [[refraction]]. When a charged particle exceeds the speed of light in the medium in which it is travelling, it emits [[Cherenkov Radiation]].
Since the speed of light in a vacuum is observed to be constant, it can be used to define distances as well. The distance that light travels in one year is known as a [[light-year]], which is about 6 million million (6x10<sup>12</sup>) miles.
Since the speed of light in a vacuum is observed to be constant, it can be used to define distances as well. The distance that light travels in one year is known as a [[light-year]], which is about 6 million million (6x10<sup>12</sup>) miles.
The speed of light raises several minor questions for [[Young Earth Creationism|Young Earth Creationists]] including that of the [[starlight problem]].
The speed of light raises questions regarding the age of the universe. These are usually summed up under the term "[[starlight problem]]".
==Notes and references==
==Notes and references==