The infrared radiation wavelength ranges between 700 nanometers and one millimeter. They have a longer wavelength than visible light and have a frequency of about 300 to 400 GHz.
The infrared radiation definition is crucial in understanding related concepts and its applications as well. Hence, students should note here that infrared radiations are not visible to the naked eye. Instead, they can only be felt by a human in the form of heat.
Although infrared rays have specific properties similar to that of light rays, they are not the same. Features like polarising, reflection, etc. can be observed with infrared radiations.
Before delving into the infrared radiation uses, students should be clear about a vital aspect. Infrared radiations are put into applications in two forms - rays and waves. The sources of infrared radiation and visible light are the heat or thermal rays.
In broad terms, it is the sun and fire that are the prime sources of infrared radiations.
However, they are trapped and used in multiple areas, including medical applications.
It is used as a source of heat based on the underlying infrared radiation meaning in areas like -
Treatment of high blood pressure
Chronic heart problems
The other applications include infrared radiation uses in physical therapy. It warms the body and helps in muscle relaxation.
The rays are also used in photography. Usually, digital cameras use this technique to click images.
Out of all these applications, the infrared radiation therapy in both muscle relaxations and medical areas have gained immense significance. It is also hoped that the recent advancements will lead to further areas of applications.
So, after reading the above lesson, students should also be able to answer the following questions. Give it a try for yourself and assess your knowledge.
Fill in the blanks
Infrared radiations have a wavelength higher than ……...…. nm.
The visible spectrum has a wavelength ……....… than infrared radiation.
X-rays have a wavelength ………….. than infrared radiation.
………... radiations are also called thermal waves.
Infrared rays have a wavelength nearing …….…. Hz.
Answers: 700, longer, shorter, Infrared, 300 to 400
For more clarity on what is infrared radiation, you can take the help of our online learning programs. There, you will get access to high quality study materials drafted by our subject experts. Also, you can download our Vedantu app for easier access to study notes and enrich your exam preparation.
1. What is Infrared Radiation?
Ans. To define infrared radiation, these are a part of the broad electromagnetic spectrum. These rays are not visible to the human eye, but they have the following properties similar to visible light - focused, polarised and reflected.
2. What are the Types of Infrared Radiation?
Ans. There are three types of infrared radiation. They are short, medium and long infrared radiations. These waves differ based on their wavelengths.
3. What are the Uses of Infrared Radiation?
Ans. Infrared radiations have a diverse area of applications - communication, astronomy, and spectroscopy. Having prior knowledge of what is infrared radiation helps in understanding this better.