Astronomy & space · Grades 9–12
One-way signal delay · formula reference
This exercise uses a constant distance and straight-line light travel, not a spacecraft maneuver model.
Formula
This exercise uses a constant distance and straight-line light travel, not a spacecraft maneuver model.
t = d/c
Worked example
A probe is 47400000 km away. Use signal speed 300000 km/s and find its one-way communication delay. Round the final result to 4 decimal places if needed. Answer in s.
Divide distance 47400000 km by 300000 km/s.
158 s
Prerequisites and checking
Algebra and the topic definitions. Keep units and rounding consistent. State the model conditions before applying the formula.
Further reading and review references
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