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Diffraction limit UPSC NOTE

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  What is Diffraction limit? The diffraction limit is the point at which the resolution of an optical instrument , cannot be improved beyond...

 What is Diffraction limit?

  • The diffraction limit is the point at which the resolution of an optical instrument, cannot be improved beyond a certain level due to the nature of light waves.

  • This refers to the instrument's ability to distinguish between two closely spaced objects

  • A higher resolution means better distinguishing power.

  • In the late 19th century, physicist Ernst Karl Abbe formulated a key relationship that defines the maximum resolution based on light wavelength and numerical aperture (N):

  • Due to the diffraction limit, traditional light microscopes can see cells but not smaller structures like proteins or viruses.

  • In the 1980s, super-resolution microscopy techniques were developed, allowing scientists to see inside cells and even down to the level of atoms.

  • Super-resolution microscopy, uses special glowing molecules (fluorophores) to surpass the diffraction limit, allowing visualization of much smaller structures.

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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Diffraction limit UPSC NOTE
Diffraction limit UPSC NOTE
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