Diffraction Limit
The diffraction limit is the fundamental resolution barrier in optical systems, caused by the wave nature of light diffracting around obstacles, making it impossible to distinguish details smaller than roughly half the wavelength of the light used. This concept underscores the inherent trade-offs in imaging technologies, from microscopes to telescopes, and has spurred innovations like super-resolution techniques to push beyond these natural constraints in modern applications.
Did you know?
The diffraction limit is why even the most advanced light microscopes can't resolve objects smaller than about 200 nanometers with visible light, leading to the development of electron microscopes that bypass this by using particles instead of waves— a breakthrough that earned Ernst Ruska the Nobel Prize in 1986 for enabling us to visualize viruses and atoms.
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