A camera obscura (Latin: "dark chamber") is an optical device that led to photography and the camera. The device 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, rotated 180 degrees (thus upside-down), but with color and perspective preserved.
History: camera obscura in Encyclopédie, ou dictionnaire raisonné des sciences, des arts et des métiers
The first surviving mention of some of the principles behind the pinhole camera or camera obscura belongs to Mozi a Chinese philosopher and the founder of Mohism. Mozi correctly asserted that the image in a camera obscura is flipped upside down because light travels in straight lines from its source. His disciples developed this into a minor theory of optics. This image helps to explain how this works. The light from the top of the object outside the window travels down through the hole to the bottom of the wall opposite. Similarly, the light from the bottom of the tree appears projected at the top of the wall, making the image appear upside down. Artists discovered this phenomenon hundreds of years ago and used it to help them create realistic images of the outside worlds on a two dimensional surface.
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Me and sherrie-ann tried to make our own camera obscura , and afterwards we went outside using the ipods to take photos of what we saw through it.
To make a camera obscura you need....
1.a carboard tube of some kind.
2.tin foil
3.duct tape
4.cellotape
5.map pins
6.grease proof paper
7. a cardboard ring
You get your tube first and you cover it with the grease proof paper and cellotape that down then you put the cardboard ring on the top and duct tape that down.Afterwards you cover the top in tin foil.Using the map pin poke a hole at the top and then your done.
Here are some photos that we took making the camera obscura.
Here are the photos we took when we went outside using it...