Recent content by deadscientist

Suppose you have an electron moving at constant velocity. This new area that it is moving into initially had 0 electric flux through it but now that the electron moves to that location the electric flux is changing which in turn cause a magnetic flux ad infinitum. So why must a charge be...

Thankyou both very much truly very helpful :)

After thinking about it more and more I'm just having more and more question I appreciate your patience and help so far, I was taught that rest mass is invariant which makes me question why the nucleus even has a change in 'rest mass' unless this rest mass taken to be from the frame of reference...

I agree but the follow up says the energy of the photon is greater than the change in rest mass can you clarify this

Now I'm really confused cause the follow up question asks why the photon energy is more than the change in rest mass (0.01mc^2) so maybe the question is the "extra credit" problem?!?

I think you are suggesting that the energy of the photon should be 0.01 times the rest mass based off conservation of energy or am I wrong?

Yes you are correct sorry I did not specify the total energy is 1.01 times the initial rest mass (your first suggestion)

I agree that's why I figured the nucleus will have some kinetic energy and momentum after the photon is absorbed, does it have anything to do with the photon being massless so it requires a much greater energy to change to momentum of a nucleus that has mass

I'm confused, 1.01 is the gamma value for the total energy, anyway say I did my calculation correctly, why would the photon have more energy than the change in rest mass? Your help so far has been greatly appreciated

Sure (Cp)^2= (1.01mc^2)^2 - (mc^2)^2 = 1.0201m^2c^4 - m^2c^4 (cp)^2= m^2c^4(1.0201-1) (cp)^2= 0.0201m^2c^4 cp= 0.1418mc^2

I got an energy of 0.14 times the rest mass

Perhaps I did it in incorrectly but I used the invariance of the rest mass; E^2=(pc)^2 + (mc^2)^2 knowing E and mc^2 solved for pc which is energy of photon?

I have done this already thanks though my question is why is the energy of the photon greater than the change in rest mass of the nucleus

The first part asks to find the energy of he photon required to produce this excitation

That is all that is given I assumed it didn't stay at rest because it has a total energy now instead of a rest energy.