What is the approximate maximum time it takes for a radio signal to travel between Earth and Mars?
Answer
Over 22 minutes
Communication latency is a separate critical factor from physical transit time, dependent on the current angular separation of the planets. When Earth and Mars are at their closest orbital positions, the time delay for a one-way radio signal is relatively brief, taking about 3 minutes to traverse the distance. However, when the planets are at their farthest points from each other in their respective orbits, the time required for a signal to travel between them dramatically increases, reaching a maximum delay of over 22 minutes for a one-way transmission.
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