4 ms·

There may be more photons than you think. 10^^17 per cm^^2 per second at the surface of the earth. https://www.reddit.com/r/askscience/comments/2n6zo0/comment/

• drdeca 8y ago
  What do you mean by the double caret (cm^^2) ?
  • zimpenfish 8y ago
    I think that's a plain text way of saying "square centimetres" - `^` often means `xor` thus `^^` to mean exponentiation (and is less obtuse than `cm2`)
    • drdeca 8y ago
      Ah, I didn't think of it being to disambiguate from xor. I would usually expect 2^3 to mean 8, and 2^^3 to mean 16 Perhaps too much time reading people talk about 3^^^^3 dust specs
    • EForEndeavour 8y ago
      I've never seen '^^' to mean exponentiation. In Python (and probably other languages), exponentiation is denoted with '', so 23 = 8.