VISIBLE LIGHT

How is the wave created?
The sun is a natural source for visible light waves and our eyes see the reflection of this sunlight off the objects around us, the color of the object is the color of light reflected, all other colors are absorbed.

HOW CAN WHITE LED HELP IN WIRELESS COMMUNICATION?

• Where there is low-none radio frequencies white light can support a wireless device at speeds of 130 Mbps
• Cover an area of 1-10^2 of about 3M

POSSIBLE DANGERS OF VISIBLE LIGHT?

FREQUENCY RANGE ASSOCIATED WITH COLORS

• Violet-400nm
• Indigo-445nm
• Blue-475nm
• Green-510nm
• Yellow-570nm
• Orange-590nm
• Red-650nm

Energy with wavelength too short for humans to see are ultraviolet (bluer than blue)

Energy with wavelength too long to see is infrared light (redder than red)

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• With regular lights the radio frequency waves are often reflected by things as a microwave.

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• But with white LED flickering at high speeds can allow you to connect to Internet (Li-Fi)

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• Also people passing your house can't connect to your internet
• Typical Red-Green-Blue LED produces speeds 10x faster than Wi-Fi.
• These lights could be used on airplanes

SOURCES USED

• Hhifraunhofer.de
• Daruill.clara.net
• Science-edu.larc.nasa.gov
• Digitaltrends.com