When U238 nucleus originally at rest, decays by emitting an alpha particle having a speed , the recoil speed of the residual nucleus is
As we learnt in
α -decay -
- wherein
From momentum conservation
Pi = Pf
Pi = 0 = Pf
Correct option is 2.
Option 1)
This is an incorrect option.
Option 2)
This is the correct option.
Option 3)
This is an incorrect option.
Option 4)
This is an incorrect option.
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