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A metasurface was recently used at Harvard to create an ultrathin, flat lens that focuses light without imparting the optical distortions of conventional lenses. Disclaimer: AAAS and EurekAlert!

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Military.com provides discount information as a service to our members. We make every effort to ensure accuracy but are not liable for the availability of discounts provided by a third party ...

Large rounds are often difficult to handle without damage during the seed conditioning process because the embryo face of a large round is more exposed than flats. Problems with seed quality won ...

Meta is entering the retail space with a new pop-up dedicated to the Ray-Ban glasses. It opens November 8, and runs until ...

We liked its wide selection of brands at various prices for all budgets, including Ray-Ban, Oakley and Armani Exchange ... a clear blue-gray acetate frame in a panto shape — round eyes with flat tops.

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object ...

Draw a ray from the object to the lens that is parallel to the principal axis. Once through the lens, the ray should pass through the principal focus. Draw a ray which passes from the object ...