About graphics
There is a vintage poster on the web about Radiographic information.
"The poster is not only still highly informative, it also gives a wonderful glimpse into the time it was made. Just look at the illustrations for the different parts of the spectrum that were allocated for specific uses (note ‘mobile’ in particular)."
This poster, it is too large to put here, goto the original site.
If I teach physics again, I will use this as the lesson plan. After they finish a section we put it up.
I finally managed to put it up in class.
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