Tunneling: an 80-EV Electron Impinges Upon a Potential Barrier 100

question 12

Multiple Choice

Tunneling: An 80-eV electron impinges upon a potential barrier 100 eV high and 0.20 nm thick. What is the probability the electron will tunnel through the barrier? (1 eV = 1.60 × 10^-19 J, m_proton = 1.67 × 10^-27 kg, ħ = 1.055 × 10^-34 J ∙ s, h = 6.626 × 10^-34 J ∙ s)

• A) 0.027%
• B) 2.7%
• C) 0.27%
• D) 2.8 × 10^-4 %
• E) 2.0 × 10^-9 %

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Definitions:

Confidence Interval

A range of values, derived from sample statistics, that is used to estimate the true value of a population parameter with a certain level of confidence.

Population Mean

The average value of all the individuals or elements within a complete population.

Lower Tail

The lower tail of a distribution refers to the section of the distribution that contains the smaller values, often used in the context of probabilities and statistical significance.

Confidence Interval

An array of values, extracted from sample statistics, considered likely to have within it the value of an unknown population parameter.