- #1

Addez123

- 199

- 21

- Homework Statement
- How big of a fraction of a 50 eV beam is transmitted through a 1nm wide, 200V barrier?

- Relevant Equations
- Shrödinger equations

I have the equations to calculate transmission probability, my problem is that the barrier is given in Volts not electron volts.

$$200V = e \cdot 200 eV = 3.2 \cdot 10^{-17} eV$$

I am not even sure if that's a correct conversion.

But if it is then this "barrier" is extremly small and 99.999% of the beam should make it "through". It's actually not tunneling through anything since the beam energy is higher than the barrier.

But the answer is that ##T = 1.1 \cdot 10^{-54}##.

So I'm comletely lost, because barriers are usually expressed in eV and google keeps telling me you cant convert eV to Volts but it's perfectly fine to convert volts to eV which makes even less sense.

$$200V = e \cdot 200 eV = 3.2 \cdot 10^{-17} eV$$

I am not even sure if that's a correct conversion.

But if it is then this "barrier" is extremly small and 99.999% of the beam should make it "through". It's actually not tunneling through anything since the beam energy is higher than the barrier.

But the answer is that ##T = 1.1 \cdot 10^{-54}##.

So I'm comletely lost, because barriers are usually expressed in eV and google keeps telling me you cant convert eV to Volts but it's perfectly fine to convert volts to eV which makes even less sense.