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i don't know where you can buy it but you can try making your own. any fabric store would probably have black and white stripped fabric.
It is quite clear, from the Doppler effect, that the Universe is expanding.It is quite clear, from the Doppler effect, that the Universe is expanding.It is quite clear, from the Doppler effect, that the Universe is expanding.It is quite clear, from the Doppler effect, that the Universe is expanding.
watch the bing bang theory on 2
Actually, it wasn't the Doppler-effect that lead to the Big Bang theory, but the red-shift of remote galaxies. Although it was initially thought that this red-shift might be caused by a Doppler-effect, it is now understood that this red-shift is caused by the metric expansion of space itself.
The Doppler effect and background cosmic radiation are the big ones.
I presume the question refers to the "redshift" of distant galaxies. Actually it is the other way around - i.e. the Doppler redshift helps to support and explain the Big Bang Theory. This "redshift" is called the "cosmological redshift". Strictly speaking, it's not the Doppler effect.
A red-shift caused by the Doppler-effect indicates that the object is rapidly moving away from the observer.Note that at extreme distances, red-shift is not caused by the Doppler-effect, but primarily by the expansion of space between the object and the observer.
How would it violate Einstein's theory of relativity? If you approach an object that emits light, or the object approaches you, the frequency of the light wave changes (according to the Doppler effect), but its speed does not change. Its speed is always the same: 300,000 km/sec.
Redshift; the generally accepted explanation for the redshift of distant galaxies is that it is cosmological redshift, caused by the expansion of the Universe. This is somewhat related to the idea of the Doppler effect.
in the vacuum of space. the Doppler effect depends on the time sound takes to travel through air, and the apparent change in that sound based on how far away it is as it approaches, passes and moves away from your stationary position. (if your position is not stationary, the effect is accelerated based on your speed as well as the speed of the moving (sounding) object or mechanism. since there is no air in space through the sound would have to travel, there should be (in theory) no Doppler effect in space. if you go into space and learn otherwise - let us earthbound humans know!
Doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are. According to the Big Bang Theory, the universe began with an enormous explosion. Then, the entire universe began to expand everywhere at the same time.The doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are.
The redshift of distant galaxies, which is normally attributed to the Doppler effect.=========================Comment #1:It's important to include in the answer the fact that the question speaks ofhow science is NOT done. Evidence is not used to support theory. Theoryis the attempt to explain existing evidence. THAT's how science works.