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In a geiger - marsden experiment. Find t...

In a geiger - marsden experiment. Find the distance of closest approach to the nucleus of a 7.7 me v `alpha`- particle before it comes momentarily to rest and reverses its direction. (z for gold nucleus = 79) .

A

10 fm

B

20 fm

C

30 fm

D

40 fm

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • (A) most of the mass of the atom is concentrated in its nucleus. (R) all alpha particles striking a gold sheet are scattered in different directions.

    A
    if both assertion and reason are true and reason is the correct explanation of assertion.
    B
    if both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    if assertion is true but reason is false.
    D
    if both assertion and reason are false.

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