Visible light is part of the electromagnetic spectrum. The Sun is our main sources of light. The other sources for visible light are the moon and the stars. It is essential to realize that we cannot see ultraviolet or infrared wavelengths. However, we are able to detect the red and blue ...
In the physics classroom, content based on superheroes can be used in support of learning materials on topics such as optics, advanced materials, kinematics, and the electromagnetic (EM) spectrum. Studies have highlighted several student preconceptions with regards to different radiation types. For ...
Of course, further along the electromagnetic spectrum, security cameras and nanny cams can already track individuals with ease. “You’ve got to remember: the context you get out of the camera is just crazy,” says Taj Manku, CEO of the Wi-Fi sensing company Cognitive Systems. “You see t...
The power in an electric current is equal to the current times the voltage (watts = volts x amps is one way to remember this), so you can see the power in the secondary coil is theoretically the same as the power in the primary coil. (In reality, there is some loss of power ...
An electromagnetic coil brings the electron beam to a very precise focus, much like a lens. Another coil, lower down, steers the electron beam from side to side. The beam systematically scans across the object being viewed. Electrons from the beam hit the surface of the object and bounce of...
Even the microwave oven in your kitchen zaps food with a form of energy from this narrow band of the electromagnetic spectrum. Its adoption in airport security is a natural -- and harmless -- extension of the technology, especially when you consider the type of disaster it's trying to ...
Atoms are proved to be semi-classical electronic systems in the sense of closeness of their exact quantum electron energy spectrum with that calculated within semi-classical approximation. Introduced semi-classical model of atom represents the wave functions of bounded in atom electrons in form of hyd...
Visible light is only part of theelectromagnetic spectrum. Electromagnetic radiation is not monochromatic — it's made up of a range of different wavelengths, and therefore energy levels. Light can be separated into different wavelengths, which we can see in the form of a rainbow. Since...
That’s because reel-to-reel tape is at least ¼ inch wide and sometimes up to two inches wide. Compared to the plastic cassette tape which is 0.15 inches wide, that’s a lot more space to capture electromagnetic information. The reel-to-reel is known for being as hi-fi as it gets...
"You can't see electrons flowing through a wire in a circuit or electromagnetic waves generated by an antenna," Andrea Mitofsky, a professor of electrical engineering atTrine Universityin Indiana, explained in an email. "Electrical engineers rely on mathematics to model these typ...