Name: 電磁頻譜 (The Electromagnetic Spectrum)
Uploaded: 2021-01-14T05:33:31.000Z
Duration: 2 min 44 s
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In this nugget we will learn about  the electromagnetic spectrum.

程度副詞

The spectrum of electromagnetic  radiation is extremely wide.

It ranges from the wavelengths of  long-wave radio transmissions

(up to 2000 metres), via short-wave  AM and FM radio

(wavelengths from 100 meter to a few meters),

microwave, radar transmission waves  and transmission from similar objects.

The wavelength of heat or radiation lies at wavelengths  of less than one thousandth of a millimeter.

Finally, we have radiation with a  wavelength between

780 and 380 nanometers  (millionth of a millimeter,

which is the visible part of the electromagnetic spectrum

Different wavelengths in the visible part of the spectrum result  in different colour impressions as wavelength decreases.

The longer wavelengths in this UV range are

part of the radiation we receive from the sun and

Shorter-wave ultraviolet radiation (UVB),

The shortest ultraviolet radiations (UVC) are

Still shorter wavelengths bring us first to X-rays,

and then to the highly-dangerous gamma-rays,

emitted as a result of nuclear decomposition.

which result from collisions between  extremely-fast-moving particles

travelling from the outposts of the universe.

Cosmic rays have wavelengths down to 10  to the power minus 18 meters.

In this nugget, we described the spectrum  of the electromagnetic radiation.

which consists of frequencies that can vary

from the invisible radio and gamma waves to the visible light spectrum.