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What is the distance of closest approach to the nucleus of a 7.7 MeV alpha particle before it comes momentarily to rest and reverses its direction?

Options

  1. A20 fm
  2. B30 fm
  3. C40 fm
  4. D50 fm

Correct answer

B. 30 fm

Step-by-step solution

Correct Option is : (B) 30 fm

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