You want to have an electron in an energy level where its speed is no more than 66 m/s. What is the length of the smallest box (an infinite well) in which you can do this? (h = 6.626 × 10-34 J ∙ s, mel = 9.11 × 10-31 kg)
A) 5.5 µm
B) 11 µm
C) 2.8 µm
D) 1.4 µm
Correct Answer:
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