electromagnetic radiation having wavelengths longer than red light (7700 angstroms) but less than radio waves (~.1 meter).
part of the electromagnetic spectrum between the red side of visible light and microwaves. Infrared cannot be detected by the human eye.
invisible radiation or light contiguous to red in the visible spectrum; light energy we feel as heat
A wave of light that, while invisible to the naked human eye, can be used to enhance visibility when using night vision devices.
a portion of the electromagnetic spectrum invisible to humans, extending beyond the color red, and often detected by the presence of heat
Light waves having wavelengths ranging from about 0.75 to 1,000 microns. Infrared light is invisible to the naked eye.
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
light that is outside the visible spectrum at its red end (greater than 800 nm).
Light not visible to the human eye, with wavelengths longer than those of visible red light and shorter than those of radio waves.
radiation of a longer wavelength than red light. It is invisible, but can be felt as heat.
A form of electromagnetic radiation with wavelengths between 0. 7 micrometres (0.0007 millimetres) and 1 millimetre. These wavelengths are longer than those of visible light, but shorter than those of microwaves. (The prefix 'infra' means 'below; infrared refers to radiation below the frequency of red light.) Infrared light is primarily thermal radiation, and we can think of this as being heat.
a form of light with slightly lower energy than visible light but with greater energy than radio waves.
Electromagnetic radiation with a wavelength between that of visible light and radio waves. We encounter infrared light in our daily lives for example in heat lamps, night-vision cameras and remote control devices. What instruments do astronomers use to find black holes
Electromagnetic Waves with a Wavelength of 1 millimeter to 700 nanometers.
electromagnetic energy radiated in the wavelength range of about 770 to 1,106 nanometers--which is just below the red end of the visible spectrum; nearly all of the infrared portion of the spectrum is invisible to the human eye; infrared LEDs are used in sensing, data transmission, ambient light detection, and other various applications.
Invisible light beyond the 750 nanometers(red end of the visible lights).
Refers to infrared rays, the longer wave lengths below the red in the spectrum. Used as a source of heat. Note: Infrared rays are usually visible as light from a infrared heater, but not when drying is used.
Infrared radiation (or infrared light) is invisible to the human eye, but can be sensed as 'heat', or thermal radiation. Even cold objects emit infrared radiation. It has a wavelength between 7000 Angstroms (less than a micron) and several hundred microns. (See also Electromagnetic radiation.) Only a small fraction of the infrared light coming from astronomical objects can go through the Earth's atmosphere: to detect the full range of infrared wavelengths a space telescope is needed. Cold and dusty astronomical objects - such as planets, asteroids or star forming regions - are best observed with infrared telescopes. ESA's Infrared Space Observatory ( ISO), operating at wavelengths from 2.5 to 240 microns, could observe objects that remain hidden for optical telescopes. The next ESA infrared space telescope, Herschel, will peer even deeper into these objects.