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en.wikipedia.org/wiki/Visible_spectrum

The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light.A typical human eye will respond to wavelengths from about 380 to 740 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 430–770 THz.

physics.info/color

Frequency determines color, but when it comes to light, wavelength is the easier thing to measure. A good approximate range of wavelengths for the visible spectrum is 400 nm to 700 nm (1 nm = 10 −9 m) although most humans can detect light just outside that range. Since wavelength is inversely proportional to frequency the color sequence gets ...

science.howstuffworks.com/dictionary/physics-terms/frequency-wavelength-light.htm

The frequency of a light wave is how many waves move past a certain point during a set amount of time -- usually one second is used. Frequency is generally measured in Hertz, which are units of cycles per second. Color is the frequency of visible light, and it ranges from 430 trillion Hertz (which is red) to 750 trillion Hertz (which is violet).

en.wikipedia.org/wiki/Color

Color (American English), or colour (Commonwealth English), is the characteristic of visual perception described through color categories, with names such as red, orange, yellow, green, blue, or purple.This perception of color derives from the stimulation of cone cells in the human eye by electromagnetic radiation in the visible spectrum.Color categories and physical specifications of color ...

sciencestruck.com/color-spectrum-chart

The frequency of wavelength range for indigo is around 425-450 nm and frequency of 670-700 THz. In the above color spectrum chart, indigo is made a subset of violet color. The low range of the color explains why it is difficult to distinguish this color in the spectral band.

altered-states.net/barry/newsletter346/colorchart.htm

Colours and their Sound and frequencies. Following is a brief description of the different colours and their Sound and frequencies. Scriabin's theory was that each note in the octave could be associated with a specific colour, and in Prometheus, the Poem of Fire, he wrote the colours and music to match. His arrangement was:

www.answers.com/Q/What_is_the_frequency_of_color

The color RED has the longest wavelenth, and the color VIOLET has the shortest wavelenth. ---- Also Wavelenth is inversely propotional to frequency, so we can also say that color VIOLET has ...

www.flutopedia.com/sound_color.htm

The resonant color of light that is 40 octaves above an F # 4 at standard pitch A4=440 has a frequency of 406.81 THz. This color has a wavelength of 736.93 nm. The equivalent RGB colors (shown above) that approximate this color of light are #750000, based on a modified version of Dan Bruton's color approximation algorithm.

study.com/academy/lesson/the-nature-of-light-origin-spectrum-color-frequency.html

Each frequency produces a different pure spectral color. We can divide the full range of spectral colors into six main groups: red, orange, yellow, green, blue, and violet. White light is a ...

science.howstuffworks.com/light4.htm

The frequency is the number of waves that pass a point in space during any time interval, usually one second. We measure it in units of cycles (waves) per second, or hertz. The frequency of visible light is referred to as color, and ranges from 430 trillion hertz, seen as red, to 750 trillion hertz, seen as violet.