Electromagnetic Spectrum Chart

[sheeny]

I made this chart a while ago to help me to come to grips with the various bands in the EM spectrum and to visualise wavelengths and frequencies.

The wavelengths were gathered from a couple of different sources ( I think Wikipedia ranked pretty high in the sources:P) so there may be some dispute over some values.

It's set up to print as an A3 sheet for a poster for the Obs, but yuo should be able to porint it on A4 and still be legible... just!

If you would like I can zip and post the original Excel workbook.

:)

Al.

[Enchilada]

Thanks for this, It is quite useful, and I have no real dispute with the values you have quoted.
Please post the Excel sheet, as that could be useful as a general reference.

Thanks for posting this Al! :)

[sheeny]

Here's the Excel workbook.:)

Enjoy,

Al.

[Starkler]

Interesting that you have the category of microwaves starting from 1m wavelength or 300MHz. It may be a pure definition, but I havent heard any in the radio business refer to sub 1GHz wavelengths as microwaves. Usually 300MHZ to 1GHz wavelengths are referred to as UHF.

[sheeny]

:lol:
I knew it!:whistle:

Feel free to correct the Excel workbook and repost it if you feel strongly about it.;) It could be a wiki-document in its own right.:whistle:

Al.

[stephend]

In Remote Sensing microwaves are defined to be in the range 1mm to 1m wavelength, which signals penetrate the atmosphere in almost any conditions. Yes the range includes some radio frequencies. I think it's not so much a pure definition as a different one based on a different criterion.

[sheeny]

I'm sure the boundaries of a lot of the bands are blurred for various reasons.:P

Al.