Electronics Art: Chart of Electromagnetic Radiation

[amirm]

I remember seeing this chart back in 1980s. It has now surfaced as a "cool thing" for engineers to print as a poster and hang on the wall.

Here is a link to a high-resolution version that you can zoom in to read or print. It is nostalgic and cool at the same time.

https://drive.google.com/file/d/0B8efip5URbLaM0UwTjV0VlYxdlU/view

Here is the history of it: http://physicsbuzz.physicscentral.com/2013/09/making-chart-of-electromagnetic.html

"The driving force behind its creation in the late 1930s was Dwight Barr, a consultant for the W. M. Welch Scientific Company. He spent two years of his life designing and editing it, with the project at times taking over part of his house. Once published, nearly every major university and scientific institution bought a copy."

 

[RayDunzl]

Here's a link to a copy you can actually read:

https://www.flickr.com/photos/llnl/9403051123/sizes/l/

 

[amirm]

Thanks. That is a good deal as it also has the original file with a whopping resolution of 10,000 by 6,958.

 

[amirm]

By the way, a bit of math on figuring out quality of such digital pictures in print. The standard for print publication for high quality photos is 300 dots per inch (dpi). Using the above numbers, the poster should be printed no larger than 10000/300 = 33 inches wide by 6958/300 = 23 inches tall. So even though the image is 70 megapixels, it is really not that high by print standard for poster size images at highest fidelity.

 

[fas42]

Just learned something - I had never heard the term "secondary" cosmic rays, looked it up to find they come in two flavours, primary and secondary.

 

[RayDunzl]

"Cosmic Rays" may not belong on the EMF chart - they're extremely energetic particles, more so than the particles accelerated by the LHC, but it's getting close.

"The energies of the primary cosmic rays range from around 1 GeV – the energy of a relatively small particle accelerator – to as much as 10^8 TeV".

LHC is a handful of tera-electron-volts. 10^8 is what... 1,000,000,000 TEV?

They aren't photons, anyway, as far as I can decipher.

https://home.cern/about/physics/cosmic-rays-particles-outer-space

 

[DonH56]

10^8 = 100,000,000 (100 million)

 

[RayDunzl]

Oh. Well, I was only off by 9 x 10^8.