Light controls matter, matter controls x-rays

Like playing a game of scissors-paper-rock, a team of scientists led by Thornton E. (Ernie) Glover of Lawrence Berkeley National Laboratory's Advanced Light Source (ALS), Linda Young of Argonne National Laboratory, and Ali Belkacem of Berkeley Lab's Chemical Sciences Division has used laser light to control x-ray beams - by first changing the material medium through which the x-rays pass.

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