Homework Statement
a gas that absorbs light of wavelength 200 nm in the laboratory. Suppose there is a cold cloud of the same gas between you and a hot source of continuum (blackbody) radiation, and the cloud is moving away from Earth. You will see a spectrum with
Homework Equations...
Homework Statement
Well this is a physics problem, need find the potential function
Homework Equations
\Psi =Axe-kx A and k are constants
I need to find d2 \Psi/dx2
The Attempt at a Solution
I thought u would just take the derivative two times
but just d\Psi/dx = Ae-kx-kAxe-kx...
Homework Statement
So i need to calculate the distance of some star the luminosity is 2 Lo and on earth its seen as .1 Lo
Homework Equations
I=L/4piR2
F=L/4piR2
The Attempt at a Solution
I found two formulas, but not sure what to use. The F is flux density, and I am not sure how I...
Homework Statement
how can i show the universe is static and not expanding, how it really is.
Homework Equations
\OmegaM=...
\Omega\Lambda=...
The Attempt at a Solution
"The expansion history of the universe depends on the amount of matter (gravity), quantified
by \OmegaM...
Hey
I have a project about dark energy. Part of it is that I need to make some kind of homework problem with this topic. The article talked about using 1a supernova data to see the expansion of the universe. I was I would first calculate the luminosity or whatever they did. Than using that...