Recent content by Andrev

Thank you very much!

Hi, I'm working on a MCNP simulation where I have to use F6 tallies. According to the manual: "In the F6 and +F6 tallies, material density is available for the chosen cells, and normalization is MeV/gm/source-particle." To which source-particles is this value normalized: the source-particles...

Interesting, thank you.

That's a good question as well and I think I know what you are pointing at. However, it's still interesting - for me at least - that at a point the photon has enough energy to react, at another one it doesn't. I guess we can pick similar examples at your classical physics situation.

Well, the energy of the two photons should be different then, right? I can not imagine it except if it lost energy during its way.

Thanks for your replies! Lets say we have an indicator (for example a photocell) which can only indicate photons which have enough energy (hf>W_out). This photocell would work at the galaxy but wouldn't work here, would it?

Hi, I figured out a thought experiment/problem, here it is: A friend of mine is living in a galaxy far away. He has a machine which can make individual photons with a definite frequency (lets say blue light) and can emit them toward me. Here I have machine which can detect these photons...

The proper English isn't mine... The incoming photons give their energy to the cathode. If these energy quantums are big enough ( \phi ≤ ) the cathode emit electrons which might (and usually) have kinetic energy. If you apply a voltage to this circuit you can speed up or slow down the...

If you know the U_{stop} you can figure out the E_{kin} from that you know v_{max} . However, I recommend you to understand/revise the theory, too.

Wouldn't really like to tell this one directly. Imagine your photocell which is in a circuit and tell me what objects are usually in a similar photocell circuit and why .

The fact that the stopping voltage is 2.00 V does not mean that there is an applied voltage at all. It means that if there was one, it should provide 2.00 V to stop the electrons before reaching the anode.

Are you sure that d_i<0 ?

Hi! I think 1., 3. and 4. are OK. 2. Indeed you got the diameter of the cluster because θ must be divided by two if you want to get the radius (try to imagine the triangle). 5. "5.Find total cluster mass and what percent is dark matter?"

The correct equation is: L=\frac{\mu_0 \mu_r n^2 A}{l}

Sorry for spamming the forum with this I solved it on my own: Of course I can calculate with the form without lgs too. I missed the calculation at the beginning: I forgot that the magnitude scale is inverse, so $$-0.4\cdot (m_1-m_2)=-0.4 \cdot \Delta m <0$$ It is ok now. Andrev