Radio waves are electromagnetic.Right?

AI Thread Summary
Radio waves are indeed a form of electromagnetic radiation. The discussion highlights the timing of the Phoenix spacecraft's entry into Mars' atmosphere, which is expected at 4:30 p.m. Pacific Time, with surface confirmation delayed due to the longer travel time of radio signals from Mars to Earth. It is noted that while light from the sun takes about 8 minutes to reach Earth, radio waves from Mars take approximately 15 minutes, indicating Mars is currently farther from Earth than the sun. This situation is explained by the Hohmann transfer orbit, which is used to optimize spacecraft travel between planets. The conversation underscores the differences in distances and travel times associated with space communication.
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Radio waves are electromagnetic.Right??

"Phoenix was on track for anticipated entry into the atmosphere at 4:30p.m. Pacific Time and reaching the surface at 4:38 p.m., although confirmation of those events comes no sooner than 15 minutes, 20 seconds later, due to the time needed for radio signals to travel from Mars to Earth."
source:
http://www.kintera.org/cms.asp?id=5...nLXK6OBLXLuKJXdP9OXI3PGKdLOLXPHE&auid=3696421

But light takes just 8 minutes to reach Earth from the sun, and here radio waves are taking 15.Is Mars farther than the sun from Earth at present??
 
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Yes. That is characteristic of a Hohmann type transfer. You target the vehicle two arrive when the planets are in opposition.
 

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