2 thoughts on “4.5 pounds of sunlight strike the Earth each day.

  • December 3, 2010 at 6:50 pm
    Permalink

    I thought light didn’t have weight?

    Reply
  • December 20, 2010 at 1:29 am
    Permalink

    Sunlight has momentum but not mass. It has no weight because photons are not affected by gravity. However, using E=MC^2, one would find that the radiation flux on Earth’s surface is about 2.8 kg/sec.

    Reply

Leave a Reply