The question of color and wavelength, the wavelength of the various colors of light

Light has waves, so it has a certain wavelength, just like sound, and we can't see it, but we can hear it. The difference in the wavelength of light causes the difference in color, and the wavelength is just the property of the beam, not the essence. Can you understand that?

It is true that humans cannot distinguish nanoscale particles with the naked eye alone – the smallest object in diameter can be distinguished, and millimeters are equal to 100,000 nanometers. However, light is not an object, it is an electromagnetic wave, there is no concept of volume, and the wavelength of electromagnetic waves is an inherent property of electromagnetic waves, it is an abstract concept, how to measure it with the naked eye? In other words, whether you can see particles at 400 nanometers or rocks at 400 meters (electromagnetic waves with a wavelength of 400 meters belong to radio), it doesn't matter what light you can see.

So why is the human eye able to receive and interpret electromagnetic waves with wavelengths between 400nm and 760nm? That's because electromagnetic waves are irradiated to the retina after passing through a refractive system composed of corneas, pupils, lenses, etc., and the photoreceptors on the retina will produce photochemical reactions after being irradiated, and only electromagnetic waves with wavelengths between 400 nm and 760 nm can make our human photoreceptors undergo this photochemical reaction. Therefore, we can only receive electromagnetic waves in this band with the naked eye, and call them visible light.

So why can we distinguish hues by the length of wavelength? This is because the human eye has three different types of cones, each type of cell contains different photoreceptor pigments, and different wavelengths of light can cause the corresponding photoreceptor to react, so that the cells are excited and this excitement is transmitted to the brain. The brain determines the wavelength of light entering the eye by analyzing the excitability of each of the three types of cones, and interprets this information as a difference in hue.

In addition, color is not only determined by the wavelength of light, but only by the wavelength of light. What determines color, or what determines color, also includes chroma and lightness. The three attributes of hue, saturation, and lightness are the basis for defining color sensory recognition.

Visible wavelength range: 390 760 nm.

Red light: wavelength range: 760 622 nm;

Orange: wavelength range: 622 597 nm;

Yellow light: wavelength range: 597 577 nm;

Green light: wavelength range: 577 492 nm;

Glaucom: wavelength range: 492 450 nm;

Blue light: wavelength range: 450 435 nm;

Violet: wavelength range: 435 390 nm.

The corresponding colors of visible wavelength are red, orange, yellow, green, blue, indigo violet.

Corresponding color: red, wavelength range: 770 622nm.

Corresponding color: orange, wavelength range: 622 597nm.

Corresponding color: yellow, wavelength range: 597 577nm.

Corresponding color: green, wavelength range: 577 Zhiliang 492nm.

Corresponding to the color of the face: blue, wavelength range: 492 455nm. Trillion Bi.

Corresponding color: indigo, wavelength range: 492 455nm.

Corresponding color: violet, wavelength range: 455 350nm.

Frequency of visible light waves:

Visible light is the part of the electromagnetic spectrum that can be perceived by the human eye, and there is no precise range in the visible spectrum. The average human eye can perceive electromagnetic waves with a frequency of 380 750 thz and a wavelength range of 780 400 nm, but there are also some people who can perceive electromagnetic waves with a frequency of about 340 790 thz and a wavelength range of about 880 380 nm. <>

The wavelengths of different colors of light are as follows:

1. Red light: wavelength range: 625 740nm.

2. Orange light: wavelength range: 590 610nm.

3. Yellow light: wavelength range: 570 585nm.

4. Green light: wavelength range: 492 577nm.

5. Indigo: wavelength range: 420 440nm. Booming mountains.

6. Blue light: wavelength range: 440 475nm.

7. Violet light: wavelength range: 380 420nm.

The principle of color wavelength:

1. Seven-color light, sunlight forms a color spectrum continuously distributed in the order of red, orange, yellow, green, blue, indigo and violet after passing through the prism.

2. The color of the object is due to the reason why it reflects light. If the object you see is red, then the object reflects red light; Other colors of light are absorbed by it (visible light is composed of seven colors of light, which are red, orange, yellow, green, blue, indigo, and violet; It is generally considered to be red, orange, yellow, green, cyan, blue, violet), the color of light is different, mainly because of their different wavelengths, the wavelength range of visible light is about 380 760nm. <>

770nm to 350nm.

The wavelength range of visible light is between 770 and 350 nanometers, and electromagnetic waves with different wavelengths cause different color perceptions in the human eye, and 770 to 622 nanometers are red. 622 to 597nm, orange. 597 to 577 nm, yellow.

577 to 492 nm, green. Quarrelsome 492 to 455nm, blue indigo. 455 to 350 nm, violet.

The importance of the wavelength of the color:

Wavelength is an important characteristic indicator of a wave, and it is a measure of the nature of the wave. For example, sound waves can be measured from their frequency, the audible sound waves of the human ear range from 20 Hz to 20 kHz, the corresponding wavelength varies from 17 m to 17 mm, and the visible light of the human eye ranges from a deep red wavelength of 770 nm to a violet wavelength of 350 m.

When discussing the propagation of elastic waves, it will be assumed that the medium is continuous, because when the wave is longer than the distance between the molecules of the medium, there are countless molecules vibrating one after another in the distance of a wave in the medium, and macroscopically, the medium seems to be continuous.

However, if the frequency of the wave source is extremely high and the wavelength is extremely small, when the wavelength is equal to or less than the distance between molecules, the distance between the two molecules is about a wave length, and there are no other molecules, and the medium can no longer be considered continuous, nor can it propagate elastic waves. <>