# Ping time

Calculate theoretical ping time between Orlando and Shenzhen which is 14102 km distant. Ping time measures the round-trip time for small messages sent from the origin to a destination that is echoed back to the source. The name comes from active sonar terminology that sends a pulse of sound and listens for the echo to detect objects under water.

Assume that signal travel in optic cable - speed of light in a fiber optic cable (200,000km/s).

Assume that signal travel in optic cable - speed of light in a fiber optic cable (200,000km/s).

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