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Atoms — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsAtoms1 Mark
MCQ
If an α-particle collides head$-$on with a nucleus, what is its impact parameter?
  • ✓
    Zero
  • B
    Infinite
  • C
    $10-10m$
  • D
    $1010 m$
✓

Answer

Correct option: A.
Zero
The perpendicular distance between the path of a projectile and the center of the potential field is the impact parameter.
Therefore, for a head$-$on collision of the $\alpha -$particle with a nucleus, the impact parameter is equal to zero.

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