The electromagnetic spectrum describes the range of electromagnetic waves ranging from visible light to the gamma rays. It is an essential aspect of science, and knowing this area of the universe is essential. I
This paper reports a study to understand the radio spectrum of thunderstorm narrow bipolar events (NBEs) or compact intracloud discharges, which are powerful sources of high‐frequency (HF) and very high frequency (VHF) electromagnetic radiation. The radio spectra from 10kHz to about 100MHz are ...
This is the simplest form of an omnidirectional antenna. The moving electric field is commonly referred to as an electromagnetic wave because there is also an associated magnetic field. A moving electric field, such as a wave, always comes together with a magnetic field - you will not find on...
The red shift is primarily caused by the expansion of the universe, which stretches the wavelengths of photons as they travel through space. This results in a shift of the spectral lines towards longer wavelengths, therefore towards the red in the electromagnetic spectrum. ...
The electromagnetic spectrum is a continuum with low-frequency long waves at one end and high-frequency short waves at the other. Visible light, the most familiar electromagnetic waves to most of us, occupies a slice of the spectrum with frequencies of around 1015 Hz (waves per second). The...
When any wavelength of light interacts with an object, it can be reflected, absorbed, scattered, or transmitted (Figure 1). These effects can be observed across the electromagnetic spectrum from the UV, through visible to the IR. Figure 1.When incident light impinges on an object, it is ref...
The electromagnetic waves create surface currents that mix and reradiate (see Figure 7). The reradiated signals are usually very low in amplitude. However, if the radiating element (rusty fence, barn, or downpipe) is close to the receiver of a base station ...
Electromagnetic radiation is measured in wavelength “λ” or in frequency “f”. Both quantities are related by the equation λ = c ÷ f, where "c" is the speed of light (3 x 10-8 m/s). Infrared radiation wavelengths fall outside the visible range in the electromagnetic spectrum; see...
The electromagnetic waves create surface currents that mix and reradiate (see Figure 7). The reradiated signals are usually very low in amplitude. However, if the radiating element (rusty fence, barn, or downpipe) is close to the receiver of a base station ...
An electromagnetic wave is a substance without mass but energy and has propagation attenuation only if propagating in a medium with non-zero conductivity. However, a vibrating particle inside a viscous solid has both mass and energy. Due to the inertia of the particle and the resulting frictional...