Microwave | Wikipedia audio article
Channel: wikipedia tts
Date: 08/12/2018

This is an audio version of the Wikipedia Article:
Microwave


00:02:10 1 Electromagnetic spectrum
00:02:44 2 Propagation
00:04:03 2.1 Troposcatter
00:04:42 3 Antennas
00:06:42 4 Design and analysis
00:07:51 5 Microwave sources
00:09:45 6 Microwave uses
00:10:39 6.1 Communication
00:14:28 6.2 Navigation
00:14:56 6.3 Radar
00:16:05 6.4 Radio astronomy
00:17:52 6.5 Heating and power application
00:20:08 6.6 Spectroscopy
00:20:50 7 Microwave frequency bands
00:22:08 8 Microwave frequency measurement
00:23:34 9 Effects on health
00:25:55 10 History
00:26:04 10.1 Hertzian optics
00:28:57 10.2 First microwave communication experiments
00:30:34 10.3 Radar
00:32:58 10.4 Post World War 2
00:35:52 10.5 Solid state microwave devices
00:37:53 10.6 Microwave integrated circuits



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

You can find other Wikipedia audio articles too at:
https://www.youtube.com/channel/UCuKfABj2eGyjH3ntPxp4YeQ

You can upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts



"The only true wisdom is in knowing you know nothing."
- Socrates



SUMMARY
=======
Microwaves are a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter; with frequencies between 300 MHz (1 m) and 300 GHz (1 mm).  Different sources define different frequency ranges as microwaves; the above broad definition includes both UHF and EHF (millimeter wave) bands.  A more common definition in radio engineering is the range between 1 and 100 GHz (wavelengths between 0.3 m and 3 mm).  In all cases, microwaves include the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum.    Frequencies in the microwave range are often referred to by their IEEE radar band designations: S, C, X, Ku, K, or Ka band, or by similar NATO or EU designations.
The prefix micro- in microwave is not meant to suggest a wavelength in the micrometer range. Rather, it indicates that microwaves are "small" (having shorter wavelengths), compared to the radio waves used prior to microwave technology. The boundaries between far infrared, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study.
Microwaves travel by line-of-sight; unlike lower frequency radio waves they do not diffract around hills, follow the earth's surface as ground waves, or reflect from the ionosphere,  so terrestrial microwave communication links are limited by the visual horizon to about 40 miles (64 km).  At the high end of the band they are absorbed by gases in the atmosphere, limiting practical communication distances to around a kilometer.   Microwaves are widely used in modern technology, for example in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industrial heating, collision avoidance systems, garage door openers and keyless entry systems, and for cooking food in microwave ovens.