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Is light a particle or a wave?

From the most distant stars in the sky to the screen in front of your face, light is everywhere. But the exact nature of ...
For decades, astronomers have known that stars orbit the Milky Way’s centre and that the galactic disc is warped.
Does light behave more like a particle, or like a wave? Today we know the surprising answer. Here's why it took so long to get there. When you purchase through links on our site, we may earn an ...