The word "Camera Obscura" comes from the Latin word "Dark Chamber". A camera obscura is an optical mechanism that led to the creation of photography and the camera. Go into a very dark room on a bright day. Make a small hole in a window cover and look at the opposite wall. What do you see? Magic! There in full color and movement will be the world outside the window — upside down! This magic is explained by a simple law of the physical world. Light travels in a straight line and when some of the rays reflected from a bright subject pass through a small hole in thin material they do not scatter but cross and reform as an upside down image on a flat surface held parallel to the hole. This law of optics was known in ancient times. it projects the external scene and rotated 180 degrees (so it appears to be upside-down), however the colour and perspective is preserved. This image can be projected onto paper, which can be useful to trace and to produce a highly accurate representation.
The image to the left is an example of a camera obscura. As you can see in this photograph, the external scene is projected and flipped horizontally so that it appears to be upside down. This is very similar to what occurs when the natural eye sees an image, however then our brain re-orientates this image so that it is the correct way up, unlike this camera obscura.
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19th of March 2015 we did camera obscura in a classroom . We got black paper and covered aspect of light for example the windows. we made sure the room was pitch black. We then made a hole in the black card which was stuck on the window, We were hoping we could see the environment that was outside to come inside. The image would turn around and we could see everything that is moving.
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