re: #55 Ojoe

Notice that the reporter leaves out the area factor, energy per unit of area. You must specify that or the statement has little meaning.

The energy of visible light measured where? Just outside the Earth’s atmosphere? On the beach at sea level in LA in June?

&c. &c.

The most ignorant people are journalists these days.

Photons are quantized, and each conveys an amount of energy according to its frequency (or wavelength). A visible light photon’s energy is in the ballpark of that required to eject an electron from an atom. Imagine a billion or so times that much.