olemus
ruumis lainena leviv elektromagnetvälja olekumuutus:
välja elektriline komponent ja magnetiline komponent
võnguvad üksteise suhtes ja laine levimissuuna suhtes risti,
olles samas faasis
=
a radiation as waves consisting of oscillating electric and magnetic fields at right angles to one another and to the propagation direction

ülevaateid
http://www.mpoweruk.com/radio.htm

https://en.wikipedia.org/wiki/Electromagnetic_radiation

https://sites.astro.caltech.edu/~george/ay1/lec_pdf/Ay1_Lec04.pdf

spekter

http://www.mpoweruk.com/images/emspectrum.gif

https://churchofthecosmos.files.wordpress.com/2012/12/electromagnetic-spectrum.png%3Fw%3D455%26h%3D276

http://www.physics-and-radio-electronics.com/physics/electromagnetic-spectrum.html

http://irina.eas.gatech.edu/EAS_Fall2008/Lecture1.pdf

https://radiojove.gsfc.nasa.gov/education/educationalcd/RadioAstronomyTutorial/Workbook%20PDF%20Files/Chapter2.pdf

vt ka
- kiirgusepüük
- kiirguseturve