Discussion
State whether the following is true or false.
Increasing the magnification of a light microscope indefinitely reveals ever finer detail.
Answer: C
Correct answer: False
Past the diffraction limit further magnification is empty magnification: the image grows but no new detail appears, because two points closer than about 200 nm cannot be separated by visible light however much they are enlarged. What is needed is a shorter wavelength, which is what the electron microscope supplies.
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