Which carries more energy, infrared or ultraviolet?

In practical terms, if you shine a laser on the palm of your hand, you will need much less power at 405nm (far violet bordering on ultraviolet) before you feel the heat compared with 532 nm (green). For 650 nm (red) you need even more power. At 808 nm (near-infrared) it takes a tremendous amount of power to feel anything. read more

Best Answer: Well, the energy of a photon is directly proportional to its frequency. The greater the frequency, the greater the energy. E = hf Ultraviolet light has a higher frequency than visible which has a higher frequency than infrared light. As for the de-exciting electrons, conservation of energy is clearly important here. read more