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Dispersion refers to the frequency dependence of the properties of a wave.

4 votes
1 answer
1k views

Refraction of white light through a glass slab: what does it actually look like?

When a collimated beam of white light enters a rectangular prism, it develops slightly coloured edges due to the dispersive refraction of the glass: each ray in the beam is displaced differently accor …
Emilio Pisanty's user avatar
312 votes
2 answers
31k views

What is Chirped Pulse Amplification, and why is it important enough to warrant a Nobel Prize?

The 2018 Nobel Prize in Physics was awarded recently, with half going to Arthur Ashkin for his work on optical tweezers and half going to Gérard Mourou and Donna Strickland for developing a technique …
Emilio Pisanty's user avatar