Ultrathin structures that can bend, focus, or filter light, metasurfaces are reshaping how scientists think about optics.
Learning how to use your camera's light meter will allow you to properly adjust your settings without the guesswork.
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Polishing a telescope mirror to perfection | Space photo of the day for Oct. 6, 2025
To keep the Very Large Telescope (VLT) at peak performance, ESO engineers carefully recoat its enormous mirrors.
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