Help would be apprecieated Another example of quantum tunneling is when you get

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Help would be apprecieated

Another example of quantum tunneling is when you get shocked by a door handle before touching it. In the graph below (plotted with the same orientation as the finger and door knob), there is no charge built up on the finger. Using the graph information, what is the potential energy of an electron going from the finger to the door knob? Using the graph information, what is the work function of the finger? Using the graph information, what is the work function of the door knob? Using the graph information, what is the distance d? Using the graph information, what is the total energy of an electron for which we might want to consider whether or not it will tunnel to the door knob? Using the graph information, what is the distance this electron would have to tunnel? How would this graph change if you built up a bunch of excess negative charge on the finger? Draw a new graph with this change. Put in the same energy electron. Identify the potential energy difference in (g) due to the voltage difference between the finger and the door that is created from excess negative charge on the finger. Did the tunneling distance change? If so, how? If not, why not? Did the tunneling probability change?

Explanation / Answer

a. ke/d

b.- ke/d

c. a+c

d. kq(c-a)/w

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