Infrared - Wikipedia
网页Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with waves that are just longer than those of red light (the longest waves in the visible spectrum), so IR is invisible to the human eye.
Infrared radiation | Definition, Wavelengths, & Facts ...
网页5 天之前 · infrared radiation, that portion of the electromagnetic spectrum that extends from the long wavelength, or red, end of the visible-light range to the microwave range. Invisible to the eye, it can be detected as a sensation of warmth on the skin.
What Is Infrared Radiation (IR(? Wavelength, Frequency, Uses ...
网页What Is Infrared Radiation? Infrared radiation (IR), sometimes known as infrared light, is electromagnetic radiation (EMR) with wavelengths longer than those of visible light. Hence, it is undetectable by the human eye, although IR of wavelengths up to 1050 nanometers (nm) from specially pulsed lasers can be seen by humans under certain conditions.
Infrared Waves - Science@NASA
网页2016年8月10日 · Earth scientists study infrared as the thermal emission (or heat) from our planet. As incident solar radiation hits Earth, some of this energy is absorbed by the atmosphere and the surface, thereby warming the planet. This heat is emitted from Earth in the form of infrared radiation.
What Is Infrared? - Live Science
网页2019年2月27日 · Infrared radiation (IR), or infrared light, is a type of radiant energy that's invisible to human eyes but that we can feel as heat. All objects in the universe emit some level of IR...
What Is Infrared Radiation? Science-Based Facts & FAQ
网页2024年3月14日 · Infrared radiation, or infrared light, is a type of radiant energy invisible to the human eye. Keep reading as we explore what infrared radiation is and how it works...
What is Infrared? - Cool Cosmos
网页2013年8月16日 · Clouds of dust that range from hundreds to tens of degrees above absolute zero appear as black soot in visible light, but glow brightly at infrared wavelengths out to several hundred microns. So, to study the cool cosmos, infrared light is our window into the heat of the coolest things around.