The distance of closest approach of an \( \alpha \)-particle fired towards a nucleus with moment... VIDEO
The distance of closest approach of an \( \alpha \)-particle fired towards a nucleus with momentum ' \( P \) ' is \( r \). What will be the distance of closest approach when the momentum of the \( \alpha \)-particle is \( 2 \mathrm{P} \) ?
(a) \( 2 r \)
(b) \( 4 r \)
(c) \( r / 2 \)
(d) \( r / 4 \)
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