JEE Main 2013 Physics question
From the following, the quantity (constructed from the basic constants of nature), that has the dimensions, as well as correct order of magnitude, vis-a-vis typical atomic size, is:
Answer: (2)
Solution
The typical atomic size is the Bohr radius m, which is option (2) with ħ misprinted as e. Option (1), , is the classical electron radius: it has the
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