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Originally Posted by Kaptain K
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If space is expanding to explain the red shift, then why does it expand so much more for radio waves than for x rays? A radio wave at z - 1 expands to twice its wavelength which is several meters, but an x-ray at z = 1 only expands a few nanometers.
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HUH!! Your point is?
A one meter radio wave emitted at z=1 expands to two meters. A billion 1 nanometer waves of X-rays (1 meter) expands to two meters (one billion 2 nanometer waves). What's the problem? :roll: |
I think I see the confussion. The question seems t be...If z is the same for all wavelengths from a given object, and, it is the space that is expanding, then, wouldn't space have to expand more for the longer wavelength light vs. the shorter. Analogy - place a 1" long rubber band parallel to a 2" long rubber band, expand the space by 1 inch (z=1 for the 1" rubber band) but the 2" rubber band has only a z of 0.5 even though both saw the same amount of [space] expansion.