Nothing causes instant damage. (See Into the Sun for an interesting take on it) The question then comes, how much exposure will damage your eyes. The Straight Dope has a very good article on this: Can laser pointers damage your eyes? As does Scientific American: Can a pocket laser damage the eye? The big take is that (until recently) the most powerful laser pointers available would cause you to blink before it would do damage to your eyes (about 0.25s).
Importance of the sun. - Sun = ultimate source of E for all organisms-The energy from sunlight is stored in the chemical bonds of molecules. - When these bonds are broken, energy is released-Same for all fuel sources (food, fossil fuel, biofuel).
The sun is the main source of electric energy, trough fossil fuels, wind turbines, hydroelectric plants, solar panels, and more. The only electrical energy we use that does not ultimately come from the sun is that generated in a nuclear power plant. Written Mar 29 Â· View Upvotes.