Retina-sensitive cells that are behind the eyes, where an image is formed. It can also do damage on the skin. These lights are used to decorate nightclubs.The UV beams emit a black light. Visible Light is used to see colors on earth and to see period. In [21] , an ultra-high speed full duplex, LAN based on star topology architecture using LED visible light communication is proposed to provide a speed of more than 10-Gb/s and tested for massive users. This black light is useful in many ways.

The Sun is the dominant source for visible-light waves our eyes receive. Every device that has a viewable screen creates and emits visible light, which your eye perceives as a picture. visible light is one way energy uses to get around and allows us to see.

This technology, popularly used in applications such as fiber-optics, now shows promise for general lighting due to the advent of LED lighting. They are used by the optic organs of humans and animals.

2.The low bandwidth problem in RF communication is resolved in VLC because of the availability of the large bandwidth as illustrated in Fig. THE SUN'S CORONA. Light therapy or phototherapy consists of exposure to daylight or to specific wavelengths of light using lasers, LEDs, fluorescent lamps, dichroic lamps or very bright, full-spectrum light, for a prescribed amount of time and, in some cases, at a specific time of day. Since visible light is a form of a wave, it is defined by its characteristic wavelength and frequency. Ultraviolet light, commonly known as UV light, is one type of electromagnetic radiation that comes from the sun and is transmitted at different wavelengths and frequencies.
The electromagnetic spectrum comprises the span of all electromagnetic radiation and consists of many subranges, commonly referred to as portions, such as visible light or ultraviolet radiation.

Visible Light Communication (VLC) systems employ visible light for communication that occupy the spectrum from 380 nm to 750 nm corresponding to a frequency spectrum of 430 THz to 790 THz as shown in Fig.

To make lasers for use in a surgery room. visible light waves can also be made using a laser.

There are vast amounts of the electromagnetic spectrum that are invisible to the naked eye, but even though they’re unable to be seen, they can still be potentially dangerous. photosynthesis uses the sun , which is a base point of visible light. all visible light starts at the sun ; therefore , photosynthesis uses visible in that manner. More energy-efficient light bulbs are being made every year. Lasers are used in CDs and DVD players, where the light is reflected from the tiny pits in the disc, and the pattern is detected and translated into sound or data.

The technology uses fluorescent lamps (ordinary lamps, not special communications devices) to transmit signals at 10 kbit/s, or LEDs for up to 500 Mbit/s over short distances. Visible light communication (VLC) is a data communications variant which uses visible light between 400 and 800 THz (780–375 nm). Today, a broad range of light bulbs and lamps exist, from the early types of incandescent light bulbs to fluorescent lights, to light-emitting diode (LED) lights. VLC is a subset of optical wireless communications technologies.. Other properties of the visible light spectrum include wave-particle duality, dark absorption lines and high speed. The visible light spectrum is located within a wavelength range of 380 to 740 nanometers (nm) or frequency range of 405 to 790 terahertz (THz). Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers. Modern science has incorporated the visible light spectrum into many electronic devices in use today. We use light to see things! You can view certain things using the UV light that are not visible to the naked eye. LED based visible light communication can be used in setting up LANs. A description of the position of visible light in the electromagnetic spectrum and a look at medical uses of visible light. Visible-light astronomy encompasses a wide variety of observations via telescopes that are sensitive in the range of visible light (optical telescopes).Visible-light astronomy is part of optical astronomy, and differs from astronomies based on invisible types of light in the electromagnetic radiation spectrum, such as radio waves, infrared waves, ultraviolet waves, X-ray waves and gamma-ray waves. Lasers are used in Compact Disc & DVD players, where the light is reflected from the tiny pits in the disc, and the pattern is detected and translated into sound or data.

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