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What formula is used to figure the time it takes a radio signal to travel from Mars to Earth?
Wiki User
∙ 14y ago
Radio waves, like all other waveforms in the electromagnetic spectrum travel at what is known as the speed of light. i.e. 3x10 to the power 8 metres per second (300,000,000)
but the distance between the earth and mars varies enormously depending on their relative positions in their orbits around the sun. Anything from approx 35 million miles at it's nearest to about 340 million miles or thereabouts at it's furthest.
So roughly 3 minutes minimum to about 30 minutes maximum.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoOn the day that Spirit landed, it took about 9 minutes and 30 seconds for a signal to go from Earth to Mars. We communicate with the rovers using radio waves which travel at the speed of light. We haven't found anything that travels faster than the speed of light, so there is no way to get our signals to and from Mars faster. Since there is one fixed speed at which our signals can travel, the time that it takes the signal to travel from Earth to Mars is based on the distance between Earth and Mars. The two planets are moving apart in their orbits, so the time for a signal to travel between them is increasing. By Spirit's sol 90 it will take about 16 minutes for a signal to travel between Earth and Mars.
Wiki User
∙ 15y agoSince Earth and Mars move around the Sun in different orbits, sometimes they are on the same side of the Sun and closer together and other times they are on opposite sided and farther apart.
Radio signals travel at the speed of light, so the time for radio signals to travel between Earth and Mars is between 4.3 minutes when they are closest and 21 minutes when they are farthest apart.
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