In our functional imaging lab we have a poster of Electromagetic radiation spectrum. The chart goes from wavelengths corresponding to millihertz all the way up to EHz which is in 10^18 Hz range. It also describes the kind of systems that use those wavelengths, like for example the 87 to 108 MHz range is used for FM radio broadcasting and so on. I wanted to have that poster for myself so I looked around to see where I can buy one online. I found it on Unihedron website.
The person who created the website has the poster available for download – some of them in PDF and JPG formats. The posters are also on sale on that website, and at least as far as the EM radation spectrum poster goes, its available at quite an affordable price on that website.
There were other posters that were equally interesting, if you are into that kind of things. They were:
- Value of Pi going up to 350,390 digits.
- Value of e going up to 350,390 digits.
- Primes numbers: The first 54,222 prime numbers
These are some great posters, especially the one with EM Radiation. Its a wonderful chart to have for reference if you are dealing with higher frequencies like in telecommunications or in medical imaging.