An alpha particle approaches a gold nucleus in ...

CBSE Class 12 Physics 2024 All Sets Solved Paper

Question : 10 of 14

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An alpha particle approaches a gold nucleus in Geiger-Marsden experiment with kinetic energy K. It momentarily stops at a distance d from the nucleus and reverses its direction. Then d is proportional to:

$\;{1}/{√ K}$
$√ K$
$\;{1}/{K}$
K

Solution:

K.E. = P.E.

K.E. = 2e ( \;{KZe}/{r})

r = \;{2KZe^2}/{K.E}

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