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| Term | Definition |
|---|---|
| Wave equation | Wave speed(m/s)= Frequency(hz) * wavelength(m), v=fλ |
| What is dBi? | Decibles. |
| What is the difference between a monopole and dipole antenna? | In essence, the difference between a monopole and dipole antenna, is that a dipole antenna uses an additionally radiator to generate a synthetic ground plane between the symmetric radiator elements, where a monopole antenna requires a physical ground plane. For a dipole antenna, the radiator elements are connected 180 degrees out-of-phase to each other, such as with the inner and outer conductor of a coaxial cable. For a monopole antenna, the reference plane of the transmission line connection, outer conductor of a coaxial cable, is the ground plane of the monopole. |
| Radio waves are | used to send bits wirelessly, the longest wavelengths and have the least energy. |
| How do electromagnetic waves differ from mechanical waves? | Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space. |
| Velocity of a wave equation | velocity = frequency x wavelength |
| EM Wave Propagation | - As with magnets, + and - aspects of wave act like poles on magnetic - As each radio wave is emitted it propels the preceding wave |
| gamma rays | Penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei. Electromagnetic waves with the shortest wavelengths and highest frequencies. |
| X-rays | Electromagnetic radiation having a very short wavelength; can penetrate substances such as skin and muscle. Wavelengths are shorter than ultraviolet rays, but longer than gamma rays |
| ultra violet | light above the visible light spectrum that humans cannot see. (Dangerous) |
| visible light | Electromagnetic waves that are visible to the human eye. |
| Infrared | Electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves. Frequencies are lower than the red of visible light. |
| Microwaves | Electromagnetic waves that have shorter wavelengths and higher frequencies than radio waves. |
| radio waves | an electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication. The part of the electromagnetic spectrum that consists of waves with the lowest frequencies, energy, and longest wavelengths. |
| What are the seven spectrums on the electromagnetic spectrum? | Radio waves Microwave Infrared Visible light Ultra violet X-rays Gamma rays |
| end of the electromagnetic spectrum | Shorter wavelength, higher frequency, higher energy |
| start of the electromagnetic spectrum | Longer wavelength, lower frequency, lower energy |
| electromagnetic spectrum | the range of wavelengths or frequencies over which electromagnetic radiation extends. |