The green laser beam thus behaves like an object, blocking the blue light and casting a dark line across the screen. RELATED STORIES — Next-gen quantum computers could be powered using chip with ...

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For example, when he picked up a green apple, a part of a Starline demo we took in at last year’s I/O, parts of his fingers shimmered around it and the spaces between the apple and his hand blurred.

On a screen opposite the blue laser, they saw a dark line where the green laser blocked blue light leaving the crystal. This curious phenomenon arises from a property of the ruby itself.