The Conductivity of a Semiconductor Sharply Increases When 400 Nm

question 4

Multiple Choice

The conductivity of a semiconductor sharply increases when 400 nm (or shorter) wavelength light is shone upon it. This is consistent with what energy gap for this material?

• A)5.2 eV
• B)3.6 eV
• C)3.1 eV
• D)1.0 eV
• E)0.45 eV

Describe how the heart prevents backflow of blood and maintains unidirectional flow.

Identify major vessels of the coronary circulation and their functions.

Understand the anatomical differences between regions of the heart.

Recognize the structural remnants of fetal circulation in the adult heart.