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

Light point sources

  1. May 25, 2004 #1
    i am a little confused as to whether light intensity at a point source is critical to how the energy will fall off(i know inverse sq ). if there is equivalent intensity from 2 sources will there be the same energy at any given distance?

    sorry if that is a little convoluted.... here is a more specific example...

    if the sun was replaced by billions of candles so it was as bright as the normal sun here on earth, would it still look the same as the sun would furthor away, say on pluto??
  2. jcsd
  3. May 25, 2004 #2


    User Avatar
    Science Advisor
    Gold Member

    Essentially yes. Only if you are close could there be a signigficant difference between the two cases.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?