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What'd be the maximum wavelength of electromagnetic radiation we'd use to read a message in a paper?
What'd be the maximum wavelength of electromagnetic radiation we'd use to read a message in a paper?
The maximum wavelength of electromagnetic radiation that we could use to read a message in a paper would be in the region of a few millimeters. This is because the wavelength of the electromagnetic radiation used in reading the message would need to be smaller than the size of the writing on the paper.