Fizeau, 1851, drag coefficinet

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In summary, the conversation discusses the direction of water in Fizeau's experiment and whether it affects the change in fringes. The speaker mentions that they have not been able to find reliable information on this and asks if there is truth to the statement that the fringes show twice as much change when comparing two directions of water versus one direction and no movement of water. The other person responds that this understanding is correct, but it is not clear if anyone has specifically tested this. They suggest looking up Fizeau's original results for confirmation.
  • #1
callejon
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Has Fizeau changed the direction of the water in his experiment?

If no, wenn we change the direction of the water, is it true that we get twice as much change in fringes?

I mean, when we compare the fringes when there are 2 directions of water, is the change more than when we compare one dircetion and no movement of water?

Because I've never read that the direction of water was changed and my teacher says now that it was changed.
 
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I haven't been able to find much in the way of reliable information on Fizeau's experiment. Google finds a bunch of crank webpages full of misinformation and little else. The sci.physics.faq on the experimental basis of relativity has only this to say:

http://math.ucr.edu/home/baez/physics/Relativity/SR/experiments.html#2. early experiments

Fizeau -- Measured the speed of light in moving materials. The Fresnel drag coefficient is solidly established by experiments, and is consistent with SR to within experimental resolutions.
 
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  • #3
callejon said:
is it true that we get twice as much change in fringes [..] when we compare the fringes [between] 2 directions of water[ versus] one dircetion and no movement of water?

Yes, that is the correct understanding but I don't know whether any particular person has bothered to perform that specific check (since there is no obvious reason to doubt it). On the other hand, why don't you just look up Fizeau's original results (using babelfish if necessary); wouldn't it be surprising if someone went to all the effort of preparing an appropriate apparatus and then only used it for flows in one direction?
 
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What is Fizeau, 1851, drag coefficient?

Fizeau, 1851, drag coefficient is a term used in fluid dynamics to describe the amount of resistance a moving object experiences due to the fluid it is passing through.

Why is the Fizeau, 1851, drag coefficient important?

The Fizeau, 1851, drag coefficient is important because it helps scientists and engineers understand and predict the behavior of objects in fluids, such as air or water. This is crucial in designing efficient and effective vehicles, aircraft, and other structures.

How is the Fizeau, 1851, drag coefficient calculated?

The Fizeau, 1851, drag coefficient is calculated by dividing the drag force acting on an object by the product of the fluid density, the velocity of the object, and the reference area of the object. This value can vary depending on the shape, size, and speed of the object, as well as the properties of the fluid it is passing through.

What factors affect the Fizeau, 1851, drag coefficient?

The Fizeau, 1851, drag coefficient can be affected by several factors, including the shape and size of the object, the speed of the object, the properties of the fluid (such as density and viscosity), and the surface characteristics of the object (such as roughness or texture).

How can the Fizeau, 1851, drag coefficient be reduced?

The Fizeau, 1851, drag coefficient can be reduced by altering the shape or size of the object, increasing the smoothness of its surface, or changing the properties of the fluid it is passing through. This is a key factor in designing more aerodynamic and efficient vehicles and structures.

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