In BC 1800, German scientist Herschel discovered that the outside of infrared rays in sunlight was surrounded by a kind of "far infrared rays" with a wavelength of 5.6- 1000UM, which would radiate, penetrate, absorb and vibrate organisms. According to the research report of the National Aeronautics and Space Administration of the United States, among the infrared rays, 4- 14 micron far infrared rays are helpful to the human body, which can penetrate into the human body 15CM, generate heat from the inside, promote microvascular expansion from the inside, make blood circulation smooth, achieve the purpose of metabolism, and then increase the immunity and cure rate of the body.

However, according to the theory of blackbody radiation, ordinary materials are not easy to produce far infrared rays with sufficient intensity. It is usually necessary to convert energy with the help of special substances, and then emit the heat absorbed by them into far infrared rays with longer wavelength through the vibration of internal molecules.

★ Far infrared rays in nature

Sunlight contains far infrared rays, but you can't enjoy far infrared rays alone when sunbathing, but there are some special substances in nature that can absorb the energy of the human body or its surrounding environment, then convert it into far infrared rays and radiate it. There are three types of classification:

1. ceramic powder

2. Long toner

3. Tourmaline powder

★ The effect of far infrared rays

1. Improve microcirculation

2. Improve immune system function

3. Increase skin activity

Step 4 improve joint pain

5. Improve the body's oxygen content

6. Promote metabolism

★ Practical application of far infrared ray

In recent years, far infrared rays have been widely used in the adjuvant treatment of many diseases all over the world, mainly using the characteristics of far infrared rays to promote blood circulation to achieve the purpose of adjuvant treatment.

The list is as follows:

1. Medical treatment: wound patch, ceramic health care instrument.

2. Industry: Far infrared fuel-saving accelerator.

3. Textiles: far-infrared fabrics.

4. Beauty: far-infrared oven, far-infrared slimming cabin

Respondent: Take the train-manager level 4 2- 16 2 1:39.

The discovery of solar infrared rays

There is a question in Herschel's heart, is the heat contained in sunlight and colored light of different colors the same?

1800, he designed a simple experiment to make sunlight pass through a prism to produce a color spectrum. Three thermometers coated with black alcohol balls (which can better absorb radiant heat) are used, one of which is placed in a certain color of visible light, and the other is placed outside the visible light as the background value measurement. It is found that the temperature rises from purple light, blue light, green light, yellow light, orange light to red light in turn!

Even more incredible, he found that the temperature next to the red light area was higher, where the naked eye could not see the light, and there was light that the eyes could not see! This is the first time that human beings have discovered invisible light, which is called "infrared".

However, it should be added that, in fact, the energy emitted by the sun is the strongest in green light with a wavelength of 5800A. Hausler measured the longer the wavelength, the higher the temperature, because in his experiment, the light energy with long wavelength was concentrated, while the light energy with short wavelength was dispersed.

This year (2000) happens to be the 200th anniversary of the discovery of infrared ray. Now, human beings can do many things with infrared detection: astronomy, medical care, security, military affairs, resource investigation, satellite cloud pictures, sea temperature observation and so on.

Interviewee: wswss 1 1986- Great Magician Grade 9 2- 16 2 1:39.

Infrared ray was discovered by a famous foreign scientist Herschel in a scientific experiment. He found that there is a magical light beyond the visible light of the sun, which is invisible to the naked eye, but its physical characteristics are very similar to that of visible light, and it has obvious thermal radiation. Because it is located outside the red light in visible light, it is called infrared. The wavelength range of infrared ray is very wide, from 0.75 to 1000 micron. Among the infrared rays, the near infrared ray has a shorter wavelength, while the far infrared ray has the longest wavelength. According to the different requirements of users, the standards are different. In practical applications, infrared rays with a wavelength greater than 2.5 microns are usually called far infrared rays.

Far infrared ray is an electromagnetic wave; It is invisible light, but it has all the characteristics of visible light. The main physical characteristics of far infrared rays are as follows:

1, emittance:

Because far infrared is an electromagnetic wave in the light range, it can be directly conducted without any medium like light, which is the emittance of far infrared.

2. Permeability (osmotic force):

Although far infrared is an electromagnetic wave belonging to light, it is different from other visible light in permeability. Far infrared has unique penetrating power, and its energy can act on subcutaneous tissue to a certain depth, and then through blood circulation, the energy can reach deep tissues and organs. This is the permeability of far infrared rays.

3, absorption, * * * vibration:

According to Kirchhoff radiation law, any good radiator must be a good absorber. At the same temperature, the greater the capacity of the radiator, the stronger its absorption capacity, which is proportional. All objects containing far infrared rays can radiate and absorb far infrared rays, and radiation and absorption are equal. The human body emits far infrared rays all the time. According to the measurement, the wavelength of the far red line emitted by the human body is about 9.6 microns. Therefore, the far infrared wavelength generated by Jianlong brand health products is 8- 15 micron, which matches the peak value of human body surface, forms the best absorption, and can be converted into internal energy of human body, which has a very close influence on the origin, occurrence and development of human life. Therefore, we also call this wavelength range far. Therefore, far infrared rays have good absorption and vibration.

Answer: Angel's Right Foot-Magic Apprentice Level 1 2- 16 2 1:40

Infrared ray is actually a kind of light and an electromagnetic wave, but its wavelength is longer than visible red light, which we can see with naked eyes, but our skin can feel its warm effect. 1800, the British astronomer Herschel discovered infrared rays.

To understand far infrared rays, we must first understand what infrared rays are. Infrared ray is actually a kind of light and an electromagnetic wave, but its wavelength is longer than visible red light, which we can see with naked eyes, but our skin can feel its warm effect. In the spectrum of electromagnetic waves (a large family of electromagnetic waves), infrared is between red light of visible light and microwave (or millimeter wave). Usually, as long as the temperature of an object is high, it will continuously emit infrared rays. With the different temperature and composition of the object, the emitted infrared wavelength is also different. The surface temperature of our human body is about 32 degrees Celsius, so the surface of our human body has been emitting infrared rays with a wavelength of more than ten microns (one micron = 10-6 meters). As long as you have starlight night vision goggles, you can see the infrared electromagnetic waves emitted by the human body.