Visible Light
The Earth emits longer wavelength infrared radiation because it absorbs sunlight and re-radiates it as heat. The Sun, on the other hand, emits shorter wavelength radiation in the form of visible light because it is much hotter than the Earth.
Incoming solar radiation that is reflected off the surface of the Earth can be absorbed by atmospheric gases, clouds, or particles in the air. Some of this radiation can be scattered or absorbed by the atmosphere and re-emitted as infrared radiation. This process helps regulate the Earth's temperature and maintain the energy balance of the planet.
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The radiation emitted by the Earth peaks around 10 microns, whereas that from the sun peaks under 1 micron. This is why Earth's radiation is referred to as longwave and solar radiation as shortwave, commonly. All objects emit radiation because all objects have a temperature. In fact, using Wien's Law you can very simply calculate the wavelength, lambda, of maximum emission: lamda(max) = c/T where c is a constant (2897) and T is the temperature of the emitting surface in Kelvin.
Greenhouse gases absorb infra red radiation (heat) coming back up from the warmed earth. They hold this heat, and in turn warm up the air around them, as well as warming the earth's surface again.
Infrared radiation has longer wavelengths than visible light.
Infrared radiation like heat.
Infrared radiation.
Longer wavelength infrared radiation reaches Earth. This type of infrared radiation is also known as thermal infrared, which is emitted by the Earth's surface and is an important component of the Earth's energy budget. Shorter wavelength infrared, such as near-infrared, is mostly absorbed by the atmosphere and does not reach the surface.
The sequence of the listing in the question is correct. From longest to shortest wavelength, these four categories of EM radiation do in fact list in the order: 1). infrared 2). visible 3). ultraviolet 4). X-rays
Infrared radiation has a lower frequency and longer wavelength than red light. Note that "infra" means "below" in this case referring to the lower frequency.
Microwaves have a longer wavelength than infrared radiation. Microwaves typically have wavelengths ranging from about 1 millimeter to 1 meter, while infrared radiation has wavelengths ranging from about 0.7 micrometers to 1 millimeter.
Infrared radiation.
Infrared is longer.
Infrared.
infrared
The word infrared is not an acronym! It refers to a wavelength of light that is slightly longer than the longest visible wavelength, which is red. Its energy content is less than red, which is what the term "infrared" means. Below red.