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Coherent waves in the electromagnetic spectrum are produced by masers, for microwaves, and lasers, for light.

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Q: How do you produce a coherent wave?
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A sudden push from an underwaer fault can produce a wave called?

The wave is a Tsunami


What occurs to produce a wave from an earthquake?

It is movement of land beneath the sea, often it is a land slide that displaces water and produces the wave.


What is the main difference between visible and coherent light?

First let us remove the word visible from this question and replace it with incoherent, as visible light can be either coherent or incoherent and coherent light can be either inside the visible spectrum or outside it.Incoherent light is random/unordered, e.g. wave phases different, shines in all directions, polychromatic.Coherent light is ordered in one or more ways, e.g. wave phases all synchronized, shines in one unidirectional collimated beam, monochromatic.The difference between light in the visible spectrum or outside it is only whether humans can see it or not, there is no difference in the light itself other than wavelength.


Why an electromagnetic wave is able to produce both an electric field and a magnetic field because?

The question founders on the rocks of a chicken/egg conundrum. The presence of both an electric field and a magnetic field is required in order to produce an electromagnetic wave.


What is coherent radiation in spectrometric methods?

There are two types of coherence time and space coherence. Time coherence means that the wave phase stays constant in time. Space coherence is when the wave phase is a constant when light travels in space. Both are really important and can be found in lasers and other sources of electromagnetic radiation.