Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

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Curved mirrors, although lighter, can introduce distortions and chromatic aberrations, compromising image quality. Diffractive lenses, such as Fresnel plates, offer a lightweight alternative but ...

While standard cameras and backyard telescopes can accommodate this, viewing distant galaxies millions of miles away requires observatories and space telescopes to use curved mirrors to minimize ...

The Passing out Parade of 12 naval officers who successfully completed Basic Orientation Course (Medical) was held at the main parade ground of the Naval and Maritime Academy (NMA), Trincomalee on ...