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Electromagnetic waves

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It takes light 20 min to travel from Mars to Earth. How might this affect a conversation between an astronaut on Mars and people on Earth? Explain. Suppose an ultra-powerful telescope were used for visual communication. Would this telescope speed things up? Why?

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The electromagnetic waves travel at the speed of light. Therefore, any audio message sent from Mars in the form of EM waves will take 20 minutes to reach earth (when the distance between ...

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