Now to the right of the visible spectrum IR - Infrared rays - Heat waves given off by thermal bodies. They are released by heat or thermal energy. Microwave - In communication, it is used in radar. You most likely know it for warming your food.
Radio Waves - An electromagnetic wave of frequency, used for long distance communication. It has the lowest energy levels. On the other hand, Shortwaves range between 1. All radio waves, short or long, belong to electromagnetic radiation like the light.
More differences between shortwave vs. Visible light sits in the region with ultraviolet UV to the left of the spectrum and infrared IR to the right. It is a form of electromagnetic radiation which can be subdivided into seven colors. It's probably the most familiar to you because it is the only region on the spectrum that is visible to most human eyes.
Rainbows are formed in this way; light passes through matter in which it is absorbed or reflected based on its wavelength. Thus, some colors are reflected more than others, leading to the creation of a rainbow.
One of the most important characteristics of Visible light is color. There are seven wavelength ranges in the visible spectrum that coordinate to a different color.
Each visible color has a wavelength. As you move from red to violet, the wavelength decreases and energy increases. Here are the 7 from shortest to longest wavelength. UV Light located next to visible light on the spectrum has higher frequency which equates to higher radiation. If you ever had a sun burn, it was due to ultraviolet radiation emitted by the sun.
The uses for UV light go far beyond the summer tan. The uses for ultraviolet light are broad and diverse. From tanning beds to bacteria disinfection to infection control. Hospitals use UV lamps to sterilize its surgical equipment that will help reduce infections. According to John Hageman, MS, CHP, Radiation Safety Officer at Southwest Research Institute, "S terilization, the killing of bacteria or any types of cells , on medical instruments is primarily achieved by the radiation causing severe damage to the cell's components and to the cell's chromosomes, specifically the DNA.
Microwave: Microwave radiation will cook your popcorn in just a few minutes, but is also used by astronomers to learn about the structure of nearby galaxies.
Infrared: Night vision goggles pick up the infrared light emitted by our skin and objects with heat. In space, infrared light helps us map the dust between stars. Visible: Our eyes detect visible light.
Fireflies, light bulbs, and stars all emit visible light. Ultraviolet: Ultraviolet radiation is emitted by the Sun and are the reason skin tans and burns. X-ray: A dentist uses X-rays to image your teeth, and airport security uses them to see through your bag.
Hot gases in the Universe also emit X-rays. Gamma ray: Doctors use gamma-ray imaging to see inside your body.
The biggest gamma-ray generator of all is the Universe. Are radio waves completely different physical objects than gamma-rays? They are produced in different processes and are detected in different ways, but they are not fundamentally different.
Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation. Electromagnetic radiation can be described in terms of a stream of mass-less particles, called photons , each traveling in a wave-like pattern at the speed of light.
Each photon contains a certain amount of energy. The preferentially interact with light waves of exactly those frequencies.
When excited in collisions, atoms and molecules emit light with a set of characteristic frequencies. This results in a line spectrum.
Only light with a discrete set of wavelengths is produced and the spectrum is not continuous, but consist of a set of emission lines. That set characterizes the atoms and molecules which produced it and can be used to identify those atoms and molecules and their environment. When light with a continuous distribution of wavelengths passes through a low-density material, the atoms and molecules of the material absorb light waves with the same set of characteristic frequencies that appear in their emission spectrum.
This produces an absorption spectrum, a nearly continuous spectrum with missing lines. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation , visible light, infrared radiation, and radio waves.
Microwaves like the ones used in microwave ovens are a subsection of the radio wave segment of the EM spectrum.
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