Recent content by andy95220

Thank you for your comments! Yes you are right! But I don’t know what’s the consequences of less energetic protons, could you please give me more hints?

One should expect the neutrons to have same energy of the protons. I don’t know much about nuclear reactions. Could you please explain more?

I guess there is no influence on the neutron energy spectrum since the neutron is not charged...is this reasonable?

Suppose some protons are impacted on a Lithium target to produce neutrons with energies close to the proton energy. If one considers Energy-loss due to proton-target collision (ionization of the target atoms), will this kind of energy loss influence neutron energy spectrum? I am asked by my...

Thanks!

Thank you so much! I totally get it now! Do you think my teacher make a mistake in post#7?

This is a solution given by my teacher, but I don't understand it. can anyone help to explain it? ‪

I have an exercise: A distant camera snaps a photograph of a speeding bullet (speed v) with length b in its rest frame. Behind the bullet and parallel to its path is a meter stick, at rest with respect to the camera. The direction to the camera is an angle $\alpha$ from the direction of the...