3 天
Boing Boing on MSNHidden for 175 years: Photographer's mysterious "witch mirror" 3D self-portrait emergesFrench photography pioneer Charles Nègre created a 3D self-portrait using a "witch's mirror" - a clever piece of 19th-century ...
A Concave mirror is used as a makeup mirror due to its property that it forms an enlarged, virtual and erect image of an object which is placed in front of the mirror and is: 5. A man standing in ...
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