Fiber lasers have laid down a strong track record for high-power, high-quality beams for industry and even the military. The challenge is pushing them beyond their current limits.
IMAGE OF THE WEEK
Dining with Telescopes
LED ceiling lights, refracted through two water glasses on a dinner table that act as positive power lenses. The coupling of the focal distances creates a a domestic “telescope” that can be used to demonstrate simple geometrical-optics concepts. (Image was taken with a Samsung S7 phone.)
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