A Through-Beam Photoelectric Sensor Is Used to Detect the Light

question 85

True/False

A through-beam photoelectric sensor is used to detect the light beam reflected from a target.

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Definitions:

American Participation

The involvement of the United States in international or domestic events, ranging from wars to political movements.

Vietnam War

A prolonged conflict from the 1950s to the 1975 between North Vietnam (supported by its communist allies) and South Vietnam (supported by the United States and other anti-communist countries), resulting in significant political and social upheaval.

Détente

A period of improved relations and reduction in tensions between countries, especially notable between the United States and the Soviet Union during the Cold War.