This is a twitter bot which tells you the weather of any city in the world. This bot can even give the definition of any word. - Diffracts/Twitter-Bot ...

Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or more of continuous-wave coherent radiation throughout the terahertz range — the spectral regime ...

You need to understand how light behaves as a wave and a particle, how it reflects, refracts, diffracts, and interferes, and how it can be polarized, modulated, and filtered.

As light hits these moving combs, it diffracts into a spectacular rainbow pattern that ripples along their transparent bodies. The deep-sea species Bathocyroe fosteri exemplifies true bioluminescence, ...