A nucleus moving with a velocity vector v emits an α-partid,
A nucleus moving with a velocity vector v emits an α-partid Let the velocities of the α-particle and the remaining nucleus be vector v1 and vector v2 and their masses be m1 and m2.
(a) vector v, vector v1 and vector v2 must be parallel to each other.
(b) None of the two of vector v, vector v1 and vector v2 to each other.
(c) vector v1 + vector v2 must be parallel to vector v.
(d) m1vector v + m2 vectorv2 must be parallel to vector v.
1 Answers
(d) m1vector v + m2 vectorv2 must be parallel to vector v.
Explanation:
Linear momentum, which is a vector, is conserved of a system if no external force is acted upon. The direction of the velocity of the nucleus v is same as its momentum. The momentum after emission of ɑ-particle m1v1 + m2v2 will have the same direction as v due to conservation principle.