Question 17 sider tunneling of an electron outside of a potential well. The form

Question

Question 17 sider tunneling of an electron outside of a potential well. The formula for the transmission coefficient is ere L is the width of the barrier and C is a term that includes the particle energy and barrier height. For a particular situation, if C = 1.0 nm-1, and you find the tunneling coefficient is T = 0.010 (1 % of the electron tunnels through the barrier), then what is the width of the barrier L? Select the correct answer O 2.3 um O 2.3 nm O 1.0 nm O 1.2 nm O 4.6 nm CHECK ANSWER 0 of 3 attempts used

Explanation / Answer

T = e-2*c*L

taking natural log both side

ln T = -2*c*L

so L = -ln T/2*c

= -ln (0.010)/2*1*109

=4.605/2*109

= 2.3*10-9 m

= 2.3 nm

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