What is wavelength? The role of visible wavelength types

Currently, lasers are widely used in life, for each purpose there will be a type of laser corresponding to each different wavelength. So to know more what is laser wavelength? The role of wavelengths that are visible to the naked eye. Tnhelearning.edu.vn will help you understand them through this article!

What is wavelength?

Wavelength is the shortest distance between two oscillations of the same phase, or the distance between two wave crests (the point at which the wave reaches its maximum value), or in general, between two repeating patterns of a wave, at a given time. . It is often abbreviated by the Greek letter lamda (λ).

Types of wavelengths visible to the naked eye

In the human-visible spectrum, light with wavelengths from 380 nm to 700 nm ranges from purple to red. Specifically, light has a wavelength

• 380nm – 440nm : violet light.
• 430nm – 460nm: indigo light.
• 450nm – 510nm: blue light.
• 500nm – 575nm: green light.
• 570nm – 600nm: yellow light.
• 590nm – 650nm: orange light.
• 640nm – 760nm: red light.

With short wavelengths, less than 380 nm, in addition to the high-energy violet light region that the naked eye cannot see, such as ultraviolet rays, X-rays, and Gamma rays, they have a bad effect on the human eye when looking at it directly. and widely used in medicine.

With long wavelengths, greater than 760 nm, in addition to the red light region has lower energy and cannot be seen by the naked eye, such as infrared rays, Viba, Radio are widely used especially as infrared rays. in the remote control,…

The role of wavelength

The power of each different wavelength can be flexible for each job

Each type of light will have a wavelength corresponding to a different power, so we can easily change it flexibly to suit each job. For example: glass has a high hardness, so laser glass engraving requires a laser with a high power wavelength of 10.6 um or 355 nm.

In eye surgery medicine, low-power Argon (Ar) lasers are used with wavelengths of 488 nm and 514.5 nm,…

Different wavelengths will give us different colors to help us apply in life

For some specific jobs such as construction works, workshops, … to facilitate monitoring and foreseeing some other light of the environment, lasers in some tools such as laser leveling machines , rangefinder,… has a wavelength with green (490 – 570 nm) or red (630 – 750 nm) to help civil engineers work easily.

Above is the article about the laser wavelength that Tnhelearning.edu.vn has informed you, hopefully the last article can help you know more about the basic knowledge about the common light and its widespread application today. now. Any questions you can leave a comment below to be answered!