A device which is optimized for its sensitivity to light and has a window that lets light pass through the package to the junction is a
A) tunnel diode.
B) photodiode.
C) light-emitting diode.
D) incandescent bulb.

Question

A device which is optimized for its sensitivity to light and has a window that lets light pass through the package to the junction is a
A) tunnel diode.
B) photodiode. 
C) light-emitting diode.
D) incandescent bulb.

Quizplus · Accepted Answer

Photodiodes are specifically designed to be sensitive to light, with a window in their packaging that allows light to reach the semiconductor material, where it generates a photocurrent.

A Device Which Is Optimized for Its Sensitivity to Light