002 10.0 points note: report your answer in joules here. a proton and an antiproton, both at rest with respect to one another, m
1 answer:
The mass of the proton is:
and the mass of the antiproton is exactly the same, so the total mass of the two particles is
.
In the annihilation, all the mass of the two particles is converted into energy, and the amount of this energy is given by Einstein's equivalence between mass and energy:
where M is the mass converted into energy and c is the speed of light. In this example,
, therefore the energy released is
and the mass of the antiproton is exactly the same, so the total mass of the two particles is
In the annihilation, all the mass of the two particles is converted into energy, and the amount of this energy is given by Einstein's equivalence between mass and energy:
where M is the mass converted into energy and c is the speed of light. In this example,
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A single photon carries an energy equal to
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where h is the Planck's constant and f is the frequency of the photon.
This means that the higher the frequency of the light, the higher the energy. Among the 5 different options mentioned by the problem, the light with highest frequency is ultraviolet, which has frequencies in the range [3-30] PHz, while visible light (red, blue, green) and infrared have lower frequency, so ultraviolet light has the highest energy per photon.