Wikipedia has some pertinent info: Laser pointer. It depends on the power output of the laser, interesting stuff about the blink reflex. I'm not a medical professional, but it sounds like shining lasers in your eyes is a bad idea regardless! This is not as pertinent; I dislike the way the question is phrased.
The ultimate source of all energy on earth is light from the sun. Plants use that energy, along with carbon dioxide from the air and nitrates from the soil, to create sugars aâ¦nd lipids (fats) as well as amino acids (ingredients for DNA) through the process of photosynthesis.
The ultimate source of energy for constructing ATP is food; ATP is simply the carrier and regulation-storage unit of energy. The average daily intake of 2,500 food calories translates into a turnover of a whopping 180 kg (400 lbs) of ATP (Kornberg, 1989, p. 65).