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Loss = 120 + 40*log(d) - 20*log(h1) - 20*log(h2) d=distance between antenna in kilometers
h1 and h2 are heights of antenna in meters.
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When is light a ray and when is it not?
Rays are used to model the propagation of light through an optical system
Explain the propagation of light through optical fiber and appilication of optical fiber as wave guide and sensor?
The concept of light propagation, the transmission of light along an optical fiber, can be described by two theories. According to the first theory, light is described as a simple ray. This theory is the ray theory, or geometrical optics, approach. The advantage of the ray approach is that you get a clearer picture of the propagation of light along a fiber. The ray theory is used to approximate the light acceptance and guiding properties of optical fibers. According to the second theory, light is described as an electromagnetic wave. This theory is the mode theory, or wave representation, approach. The mode theory describes the behavior of light within an optical fiber. The mode theory is useful in describing the optical fiber properties of absorption, attenuation, and dispersion
What is an em wave?
It is an "electromagnetic wave." Electromagnetic waves are by definition is any kind of actual radiation. X-Ray, microwaves, light, radio waves, and gamma rays. It does not include those forms of matter more commonly known as radiation (alpha and beta particles), or neutrinos. An EM wave is actually a combination of both electric and magnetic fields, perpendicular to each other and to the direction of propagation of the wave.
An example of a wave that can travel through empty space?
radio heat light infrared green ultraviolet x-ray gamma ray gravity waves
What has the author Jayaram Ramasastry written?
Jayaram Ramasastry has written: 'Mass spectrometry; theory and applications' -- subject(s): Ionosphere, Mass spectrometry, Observations 'A ray tracing digital computer program for the study of magnetospheric duct propagation' -- subject(s): Data processing, Ionospheric radio wave propagation
What are the examples of electromagnetic wave that we can find in electromagnetic spectrum?
-- a radio wave -- a heat wave -- a yellow wave -- a blue wave -- an ultraviolet wave -- an X-ray -- a gamma ray
Is an X-ray wave a mechanical wave?
No, an X-ray is not a mechanical wave. An X-ray is an electromagnetic wave. However, in polar molecules, an X-ray can cause the molecule to vibrate rapidly, just like a microwave oven can.
Who has a lower frequency gamma ray infrared wave radio wave or visible light?
Gamma ray
What kind of wave is a gamma ray?
A gamma ray is an electromagnetic wave. It has the highest frequency (and energy) as well as the shortest wavelength on any wave on the electromagnetic spectrum.
What is an electromagnetic ray?
In old concepts light wave had been considered as light ray. Same way electromagnetic wave is considered as electromagnetic ray.
Which has the greatest frequency out of radio wave microwave infrared wave visible light ultraviolet light x-ray gamma ray?
gamma ray
What is the orientation of a ray in relation to the wave front of a wave?
Perpendicular
