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May 2, 2024 · Essentially, that equates to the colors the human eye can see. It ranges in wavelength from approximately 400 nanometers (4 x 10 -7 m, which is violet) to 700 nm (7 x 10 -7 m, which is red). It is also known as the optical spectrum of light or the spectrum of white light.
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The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.
When it comes to visible light, your eyes can pick up anything from 430 trillion Hz — which you understand as red — to 750 trillion Hz — which you see as violet. There are other, higher frequencies that you can't see, and there are lower ones that you can't see either.
- Visible light has a frequency ranging from 7.5×10^14 Hz (blue) to 4.3×10^14 Hz (red).
- The spectrum of wavelengths we can see (visible light) ranges from 380 nm (blue) to 700 nm (red). Below this spectrum is ultraviolet, after which w...
- At 400 nm, we see a color between violet and blue named indigo. Nm stands for "nanometers," or one billionth of a meter.
- To remember the seven colors of the visible light spectrum, try memorizing the name "Roy G. Biv." The abbreviation represents red, orange, yellow,...
In humans, there is a separate function for each of two visual systems, one for photopic vision, used in daylight, which is mediated by cone cells, and one for scotopic vision, used in dim light, which is mediated by rod cells. Each of these functions have different visible ranges.
Jun 7, 2024 · The human eye sees color wavelengths ranging roughly from 400 nanometers (violet) to 700 nanometers (red). Light from 400–700 nanometers (nm) is called visible light or the visible spectrum, because humans can see it. Light outside of this range may be visible to other organisms but cannot be perceived by the human eye.
- Anne Marie Helmenstine, Ph.D.
Light waves have wavelengths between about 400 and 700 nanometers (4,000 to 7,000 angstroms). Our eyes perceive different wavelengths of light as the rainbow hues of colors. Red light has relatively long waves, around 700 nm long. Blue and purple light have short waves, around 400 nm.
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Dec 7, 2022 · The primary colours of light are red, green and blue. The secondary colours of light are cyan, magenta and yellow. Cyan is made by combining blue and green. Magenta is made by combining blue and red. Yellow is made by combining green and red. Computer screens and TV screens use these colours of light to make all of the colours that you see.
