A student conducts an experiment using an α -particle source. When considering safety precautions, what can be assumed to be the maximum range of α - particles in air?
Correct answer: B. Between 5 mm and 200 mm
- A. Between 0 mm and 5 mm
- B. Between 5 mm and 200 mm
- C. Between 200 mm and 500 mm
- D. Between 500 mm to 1000 mm
Explanation
By definition, range of α-particles is 5 mm to 200 mm. This range is more realistic for the maximum range of α-particles in air, especially for lower-energy α-particles. However, α-particles with higher energies can travel even farther in air.
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