diffraction

Wafer-Thin

Wafer-Thin 'Metalens' Uses Nanotech to Blow Glass Out of the Water

Physics could soon make it possible to replace those bulky, heavy, glass lenses on the front of cameras with wafer-thin "metalenses."
Behaviour of waves

Behaviour of waves

All waves behave in certain characteristic ways. They can undergo refraction, reflection, interference and diffraction. These basic properties define the behaviour of a wave – anything that reflects, refracts, diffracts and interferes is labelled a wave.
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