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a level phy qs help

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how do i answer these (the whole calculations thing or wtv) , ty <3 .
(edited 2 months ago)
Original post by mzzz_k

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how do i answer these (the whole calculations thing or wtv) , ty <3 .



When a muon and an antimuon annihilate, the event would produce a minimum of 2 photons of the same energy.
So we can find the energy of 1 photon from the rest mass energy of a muon which allows you to find the wavelength.
Original post by mzzz_k
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how do i answer these (the whole calculations thing or wtv) , ty <3 .


You can apply the various conservation laws for particle physics to eliminate the options:
conservation of baryon number
conservation of lepton number
conservation of charges

And use the following “conservation law” for weak interaction to determine the possible products.
Strangeness can change by 0 or ±1 for weak interactions.

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