JEE Advanced 2021 Physics question
A heavy nucleus , at rest, undergoes fission , where and are two lighter nuclei. Let , where , and are the masses of , and , respectively. and are the kinetic energies of and , respectively. The speeds of and are and , respectively. If is the speed of light, which of the following statement(s) is(are) correct?
Answer: (A),(C),(D)
Solution
Energy conservation: the mass defect appears as kinetic energy, – (A) correct. Momentum conservation (nucleus initially at rest): , so – (C) correct. With equal momenta, , so
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