There’s a famous story (also proven false) that NASA spent millions of dollars inventing a pressurized pen that could work in the zero gravity of space, while Soviet cosmonauts just used pencils. A ...
Amid the thousands of treasures in the Cincinnati Art Museum's East Asian art collection, a small bronze mirror dating back to the 15th or 16th century always seemed rather unremarkable.Last exhibited ...
A spherical mirror is that mirror whose reflecting surface is the part of a hollow sphere of glass. Spherical mirrors are of two types: concave mirror and convex mirror. In a concave mirror reflection ...
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