waves - Why do we demand that $\lambda \ll \text{size of slit

I'd appreciate it if anyone could explain to me why do we demand that the wavelength will be much smaller than the distances between the slits in order to see wave diffraction when performing Young's

4.16 What is diffraction?

pic5.jpg

EDGES of the dark forest: A new absorption window into the composite dark matter and large scale structure

Correlated Phases in Spin-Orbit-Coupled Rhombohedral Trilayer Graphene

Diffraction Light bends! Diffraction assumptions - ppt download

6.5 Diffraction through a single slit, 2d and 3d wavefronts

How does diffraction behave when the wavelength is greater than the width of the slit? - Quora

Why should the width of the slit be comparable to the wavelength of the wave for observable diffraction? - Quora

Waves/Double slit Diffraction - Wikibooks, open books for an open world

Super Bound States in the Continuum on Photonic Flatband: Concept, Experimental Realization, and Optical Trapping Demonstration

The role of channel height and actuation method on particle

309.jpg

Super Bound States in the Continuum on Photonic Flatband: Concept, Experimental Realization, and Optical Trapping Demonstration