![]() ![]() ![]() In other words, the light waves in a laser beam spread out much less than those in a flashlight beam do, directing more of its energy into a small spot. It also means less energy gets delivered to anything illuminated by that light.Ĭoherent light waves can be more focused. This makes it harder to focus the light into a beam that doesn't disperse over long distances. Further, that light needs to be a single wavelength, and all the light waves need to be in step - a state called coherence.Ī neon light bulb generates light of specific wavelengths, but those waves aren't all in step they're jumbled together, with the crests and troughs at different places. The word "laser" is actually an abbreviation for "light amplification by stimulated emission of radiation." To make a laser, you need a lasing medium - some material that emits light when it is stimulated by energy.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |