[单选题]
An electron is known to bpd/cms* /t ma1i;dki2 s2c -wqe confined to a region of width 0.1 nm. What is an approximate expressioc ;wk2 s-2qidin for the least kinetic energy it could have, in eV?
A. $2.7 \; eV$
B. $3.2 \; eV$
C. $3.8 \; eV$
D. $4.3 \; eV$
Post time 2024-1-22 00:52:27