KCET 2021 Physics Solved Paper

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Question : 15 of 60
 
Marks: +1, -0
A proton moving with a momentum p1 has a kinetic energy
1
8
th of its rest mass-energy. Another light photon having energy equal to the kinetic energy of the possesses a momentum p2.
Then, the ratio
p1−p2
p1
is equal to
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