Simple: When waves travel towards you, you perceive them differently than when they are travellling away from you. This is easily experienced in traffic; when a car comes towards you, it sounds different than when going away from you. Same with radio waves; they appear blue when coming towards you, and appear red when going away from you!
And the heaven We created with might, and indeed We are (its) expander. (Quran 51:47)
At the time of the revelation of the Quran, the word space was not known, and people used the word heaven to refer to what lies above the Earth. In the above verse, the word heaven is referring to space and the known universe. The verse points out that space, and thus the universe, happens to be expanding, just as Hubbles Law states.
I have a question. An often quoted analogy to describe the expansion of the universe is that of an expanding balloon, with points on the balloon representing galaxies. As the balloon expands, the points recede from each other, but doesn't the 'unit' of distance also expand with the balloon, so that the 'distance' between points remain the same? Can anyone care to enlighten me?
@maxwellsdaemon7 While space itself is expanding, our perseption of it is not. Therefore, we see it as getting not bigger, but rather galaxies are getting further and further away from each other.
a law that says that the univers ist expanding and that the light that comes from far galaxies shift to red ( like when you hear a police car going far from you the sound is lower pitched than when the car was near you , thats the same with light)
Simple: When waves travel towards you, you perceive them differently than when they are travellling away from you. This is easily experienced in traffic; when a car comes towards you, it sounds different than when going away from you. Same with radio waves; they appear blue when coming towards you, and appear red when going away from you!
tropickman 1 year ago
SQUIGGLY LINES
zeiontic 2 years ago
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And the heaven We created with might, and indeed We are (its) expander. (Quran 51:47)
At the time of the revelation of the Quran, the word space was not known, and people used the word heaven to refer to what lies above the Earth. In the above verse, the word heaven is referring to space and the known universe. The verse points out that space, and thus the universe, happens to be expanding, just as Hubbles Law states.
2009abuabdullah 1 year ago
I have a question. An often quoted analogy to describe the expansion of the universe is that of an expanding balloon, with points on the balloon representing galaxies. As the balloon expands, the points recede from each other, but doesn't the 'unit' of distance also expand with the balloon, so that the 'distance' between points remain the same? Can anyone care to enlighten me?
maxwellsdaemon7 2 years ago
@maxwellsdaemon7 While space itself is expanding, our perseption of it is not. Therefore, we see it as getting not bigger, but rather galaxies are getting further and further away from each other.
galimor00 1 year ago
@smokebala
a law that says that the univers ist expanding and that the light that comes from far galaxies shift to red ( like when you hear a police car going far from you the sound is lower pitched than when the car was near you , thats the same with light)
mehdital 2 years ago
Well done
TheReasonWhyGuy 3 years ago