Back in 1873 the famous British physicist JCMaxwell creates a general theory describing the processes occurring in the electromagnetic field.Waves were presented in the form of vortex disturbances.Subsequently, most of his theoretical calculations brilliantly confirmed.Currently, Maxwell's theory widened since the fields themselves have been considered from the point of view of the processes of quantum physics.It was also suggested that even visible light is nothing else than one of the varieties of the electromagnetic wave.In 2009 it was finally proved by physicists (measured by the magnetic component of the luminous flux).Its main difference from other types of electromagnetic waves in the wavelength.
We are all accustomed to the light, seeing it for granted and rarely asking the question: what is the wavelength of light that it is and so forth. Even the Bible says that God created light on the first day of creation.Indirectly, this shows the importance of this to all living things.Visible light radiation is electromagnetic nature, which may be directly registered eye.However, the body of records is not the whole spectrum of waves, but only a certain period: the lower boundary is approximately 380 nm, 780 nm and the top.Why is "about"?Because of the sensitivity of each person is different, and these limits are approximate.The full range is so vast that the visible wavelength of light a person is only 0.04%.
If you visualize two-dimensional coordinates, the horizontal axis will be delayed wavelength in nanometers, while the vertical axis indicates the sensitivity of the eye.Accordingly, the beginning of a wave falls on the 780, and the end - to the peak of 380 reached a value of 555 nm.In the interval of 10 nm - 380 nm is UV radiation and infrared 780 nm - 1 mm.The total gap is the amount of ultraviolet, visible and infrared radiation is an optical spectrum, although this does not mean that all of them with the naked eye to see.The wavelength of light - is the most important characteristic for a person, because it is thanks to her we can distinguish colors.Most just catch the color tones at the peak wavelength (555 nm), but at the edges, in the areas of blue and red colors more complicated.Therefore, it is the determination of derivatives shades people sometimes have disagreements, because the sensitivity of receptors different eyes.Interestingly, the 555 nm - a spectrum of green, which is well distinguishable.Is it a coincidence that the grass and the leaves green?By the way, you can see part of the infrared radiation, if the direct mobile phone camera (or digital camera) to the LED operating the remote control of household appliances (TV, tuner, etc.).
wavelength of red light corresponds to 700 nm, that is, almost from the very edge of the visible area.It follows that the 10 conventional units radiation in this range will be caught by the eye as a unit in the green (555 nm).But the wavelength of yellow light is from 560 nm to 590 nm is closer to the peak wavelength, so errors in determining colors by the human eye are rarer.
addition of different colors in life often have to deal with white.In fact, no white spectrum.It is obtained by mixing the three basic colors.It is believed that if you combine all the seven colors of the same intensity, it will turn pure white.At the same time, usually at least one predominates, which adds a certain group.You can do easier and mix all three colors - red, blue and green.The existence of television screens based on cathode ray tubes with three electrodes (Red, Green, Blue), can display white point, it is a direct proof of this.
