How can we see through solid objects?

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Offline thedoc

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How can we see through solid objects?
« on: 11/05/2010 18:04:31 »
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« Last Edit: 11/05/2010 18:04:31 by _system »

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Offline syhprum

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How can we see through solid objects?
« Reply #1 on: 11/05/2010 21:56:12 »
Visible light cannot pass thru what we class as solid objects as a rule excepting such solids as glass and some plastics.
Other frequencies of of electromagnetic radiation can do so readily, such as radio waves and energetic radiation such as Xrays and Gamma rays.
Radio waves of .1 mm to 1 mm are coming into use as airport scanners as they pass readily thru clothing and can reveal hidden weapons and are of a sufficiently short wavelength to provide good resolution.
 
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