Which statement best describes the principle of the camera obscura?

A. Light passing through a hole in the wall of a completely darkened room forms an image of the outside object on the opposite wall.

Answer 1


The answer is B – which contains ‘inverted image’.

The camera obscura is a device that consists of a box or room with a hole in one side. Light from an external scene passes through the hole and strikes a surface inside where it is reproduced, UPSIDE-DOWN (inverted), but with color and perspective preserved. The image can be projected onto paper, and can then be traced to produce a highly accurate representation. The first camera obscura was later built by an Iraqi scientist named Abu Ali Al-Hasan Ibn al-Haytham, born in Basra (965-1039 AD), known in the West as Alhacen or Alhazen, who carried out practical experiments on optics in his Book of Optics. http://en.wikipedia.org/wiki/Camera_obscura

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