Linked from
The 58 pages that link to Diffraction, each with the reason it gives.
WavelengthRelated: Its patterns depend on wavelength relative to obstacle and aperture sizes.
TelescopeRelated: Diffraction places a fundamental limit on the detail a telescope can resolve.
OpticsRelated: It limits image detail and reveals light's wave behavior.
SineRelated: Sine functions describe wave phases used to calculate diffraction patterns.
PhotolithographyRelated: Diffraction blurs mask patterns as light is projected onto resist.
ApertureRelated: At very small apertures, diffraction softens fine image detail.
WavefrontRelated: It changes wavefront shape beyond obstacles and openings.
Gaussian beamRelated: A finite Gaussian profile necessarily spreads as it propagates.
Dennis GaborRelated: Illuminating a hologram diffracts light to reconstruct the recorded wavefront.