French photography pioneer Charles Nègre created a 3D self-portrait using a "witch's mirror" - a clever piece of 19th-century ...

A convex mirror produces a diverging effect, meaning that it causes light rays to spread outward instead of focusing. The image formed by a convex mirror is always virtual, upright, and smaller ...

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To achieve this, we consider a slightly deformed curve deviating from a straight line and construct a set of differential equations by comparing them to the equation determining charged pion wave ...

Mohamed Salah has dropped his biggest hint yet that he will quit Liverpool when his contract runs out at the end of the season. Asked if there had been any developments regarding a new deal, the ...