Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Radio waves are electromagnetic.Right?

  1. May 28, 2008 #1
    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."

    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??
  2. jcsd
  3. May 28, 2008 #2

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Yes. That is characteristic of a Hohmann type transfer. You target the vehicle two arrive when the planets are in opposition.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook