What is infrared ray? Applications of infrared rays in life

Discovered in the early 19th century, up to now, infrared rays have been widely applied in daily life with specialized fields such as medical, electronic, military,… Let’s find Learn more about infrared rays and their applications through the article below.

What is infrared ray? How many types are there?

Infrared is electromagnetic radiation with a wavelength longer than visible light.

Normally, our eyes can see 7 colors of light from purple to red, of which red light has the largest wavelength of 700nm. Therefore, infrared rays will have wavelengths in the range of 700 nm to 1 mm and are divided into 3 types according to wavelength length.

This includes near-infrared, mid-infrared and far-infrared. Far infrared rays have the longest wavelength and the lowest radiant energy.

Working principle of infrared rays

All objects with a temperature greater than 0 degrees K can emit infrared rays, such as LED lights, TV remotes, computer monitors, … and a large amount of infrared rays come from the sun. Scientists have proven that far infrared rays with wavelengths from 4 to 14 micrometers are very important for the life, growth and development of organisms on Earth.

Far infrared rays when in contact with the skin on the body will radiate heat, warm and spread to the surrounding areas. This heat helps promote the body to produce substances that repair proteins and strengthen the body’s immune function.

With a long wavelength, far infrared rays are very safe for health and completely harmless to the body.

Application of infrared rays in life

Infrared rays are widely used in medicine , proven to be able to treat many diseases such as cancer, gastritis, hepatitis, prostatitis, high blood pressure, asthma, .. In addition, infrared rays also help to soothe the wounds caused by cold or hot burns, have the effect of beautifying the skin, treating acne, …

Electronic devices such as remote controls, optical mice, etc. use LEDs emitting infrared rays to transmit information. Infrared sensors in many public places such as airports, hospitals, … help identify people and objects moving around, as well as detect foreign objects in passengers’ suitcases.

In particular, infrared rays are applied to night vision equipment such as surveillance cameras, headlights, … to help us observe in low-light environments, widely used in the military as well as in the military. daily life.

Hopefully with the above article, you have gained more useful information about infrared rays and their applications.