So do fluorescent and incandescent light bulbs. What produces blue light?īlue light, like other colors of visible light, is all around you. High-energy blue light waves are nearly as powerful. Health experts have warned against the harmful effects of UV rays, which can damage your skin and your eyes. In fact, they’re only slightly longer and less powerful than ultraviolet (UV) waves (which are too short for people to see with the naked eye). Blue light has very short, high-energy waves. The longer the wave, the less energy it transmits. Visible light waves vary in length from 380 nanometers (violet light) to 700 nanometers (red light). But a small band of waves, known as visible light, can be detected by the human eye. Most electromagnetic waves are invisible. The waves vary in length from longer radio waves, microwaves, infrared, and UV waves to the shorties of the electromagnetic spectrum: X-rays and gamma rays. It travels around us, and even through us, in waves. The world is pulsing with electromagnetic energy.
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