Tunneling: an Electron with Kinetic Energy 2

question 30

Multiple Choice

Tunneling: An electron with kinetic energy 2.80 eV encounters a potential barrier of height 4.70 eV. If the barrier width is 0.40 nm, what is the probability that the electron will tunnel through the barrier? (1 eV = 1.60 × 10^-19 J, m_el = 9.11 × 10^-31 kg, h = 6.626 × 10^-34 J ∙ s)

• A) 1.4 × 10^-2
• B) 2.8 × 10^-2
• C) 5.5 × 10^-2
• D) 1.1 × 10^-2
• E) 1.4 × 10^-1

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Definitions:

Brachial

Pertaining to the arm, especially the upper arm, or an arm-like structure.

Radial

Pertaining to the radius bone in the forearm or relating to structures that are located near or radiate from a central point.

Sciatic Nerve

Tibial and common peroneal nerves bound together; also called ischiadic nerve.

Tibial Nerve

A nerve in the lower leg that is a branch of the sciatic nerve, responsible for innervating parts of the lower leg and foot.