Magnification does not recover missing optical detail
Enlarging a blurry image makes its shapes bigger without necessarily revealing more detail. In an ordinary light microscope, diffraction spreads the light from nearby points into overlapping patterns. Explore why magnification and optical resolution place different limits on what can be distinguished.
Questions you could explore
- How do wavelength and the light collected by the lens affect whether two points remain distinguishable?
- How does enlarging an image differ from improving the optical resolution of the instrument that made it?
Start reading
- OpenStax, University Physics Volume 34.5 Circular Apertures and Resolution
Shows how diffraction blurs neighboring points and relates the resolution criterion to wavelength and aperture.
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