I have le physicz questionzzz.
Q7(i) and (iii) - Is my reasoning correct here?
(i) Because
X and
Y are obviously attracted to one another, this means they have opposite charges and hence the
λ particle is neutral? Or is that complete out of whack? Even if I'm correct, I'm not entirely sure why the two X and Y particles having different polarities mean that the
λ particle is neutral.
(iii) So obviously we're going to have the
λ particle decaying into the two particles, and we know that a property of radiation is that the total energy is conserved, be it in the form of mass or not which would make
D the obvious choice, but what's wrong with
A (how do you know that that's not correct?), option
B is definitely ruled out. What's the subtle caveat with option
C - what does the difference from adding 'energy' in front of the 'mass' make a difference? I thought that mess and energy were equivalent, so either option seemed fine to me; but that's just a misunderstanding on my part.