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How to calculate light intensity?

  1. Jan 29, 2016 #1
    I am calculating the light intensity of Mercury.
    I was given the average distance from the Sun in AU's which is 0.39.
    Using the formula (1/(d^2)), I solved for the light intensity relative to Earth which I found to be 6.57.
    I need to find the light intensity in (w/(m^2))
  2. jcsd
  3. Jan 29, 2016 #2


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    Staff: Mentor

    You will need some additional input, like the intensity at 1 AU ("solar constant"), or the total power of light emitted by the sun, or something similar.
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