Show that pair production is not possible without a neighbouring particle that takes part of the momentum.

Physics

1 answer:

egoroff_w [7]2 years ago

3 0

Answer:

By conservation of momentum

Explanation:

By conservation of energy, the photon needs at least the same amount of energy as the energy rest mass of the electron and positron together, which is around 1,02 MeV. But, by conservation of momentum, the electron-positron do not have momentum, while the photon had some. This means that, in order to conserve momentum, we need another neighboring particle, normally an atomic nucleus, to receive the photon's momentum.

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You are holding a positive charge and there are positive charges of equal magnitude 1 m to your north and 1 m to your east. what

pychu [463]

By holding a positive charge and there are positive charges of equal magnitude 1 m to your north and 1 m to your east. Therefore, the direction of the force on the charge you are holding will be to the southwest.

Let I hold the charge , q at the centre of given co-ordinate system and two positive charge of equal magnitude Q are placed 1 m to my North and 1 m to my South .

now, both the charge are same nature e.g., positive . Let my charge is also positive (well, you can assume negative too , I am considering positive because it makes me easy to solve) then, both charge repel to my charge.

charge Q placed on east is repelling my charge q toward west . similarly charge Q placed on North is repelling my charge q toward south.

Now , use vector for solve it.

vector $F_{net}$ = vector Fe + vector Fn,