"It has been established that the discovery of the camera obscura was accidental, sometime in early 11th century Egypt. A Muslim named Abu Ali Al-Hasan Ibn al-Haitham (965-1039 CE), known in the West as Al-Hazen, is accredited for its discovery while carrying out practical experiments on optics. [...] In the experiment he undertook, in order to establish that light travels in time and with speed, he says:'If the hole was covered with a curtain and the curtain was taken off, the light traveling from the hole to the opposite wall will consume time.'"
(Wikipedia)
(Wikipedia)
Response to Brant Gallery Camera Obscura:
Whoa, that was nuts. We were in the dark for a really long time, it seems. We saw the image on the paper first, which was brighter and more in focus due to its concentration, which makes sense. Its the same thing as when you have a shorter exposure time when the enlarger is closer to the paper than when it is higher up and farther away when printing. It took us longer to see the image on the back wall but it was visible eventually. The thing we, or at least I thought was the most interesting about the camera obscura was that it captured moving objects in space in real time. It does consume time, the way Al-Hazen said. It projects exactly what is happening without the use of technology or any sort of unusual delay. I thought it would be wild to be in a camera obscura that was projecting in the rain or during a rain storm, but obviously the likelihood of that happening isn't very good seeing as the light during a rain storm probably wouldn't be powerful enough to project. My group was talking about how the camera obscura is similar to a giant eye, in the sense that it gathers reflected light and projects the images upside down. Your brain conforms to the image and turns things right side up, but that is not how light normally reflects.
Brant Still Life Camera Obscura:
I had problems drawing the still life correctly, mostly because I couldn't see my paper but partly because I can't draw. The strongest parts of the reflection where the hand and the bottle, in fact those were the only objects visible at all. This could possible be due to the fact that they had the most surface area exposed directly to the light? At any rate, they were the brightest and most recognizable objects. Still, my sketch of them just looks like disfigured pancakes in space.
(image should be turned 90 degrees CCW)
Whoa, that was nuts. We were in the dark for a really long time, it seems. We saw the image on the paper first, which was brighter and more in focus due to its concentration, which makes sense. Its the same thing as when you have a shorter exposure time when the enlarger is closer to the paper than when it is higher up and farther away when printing. It took us longer to see the image on the back wall but it was visible eventually. The thing we, or at least I thought was the most interesting about the camera obscura was that it captured moving objects in space in real time. It does consume time, the way Al-Hazen said. It projects exactly what is happening without the use of technology or any sort of unusual delay. I thought it would be wild to be in a camera obscura that was projecting in the rain or during a rain storm, but obviously the likelihood of that happening isn't very good seeing as the light during a rain storm probably wouldn't be powerful enough to project. My group was talking about how the camera obscura is similar to a giant eye, in the sense that it gathers reflected light and projects the images upside down. Your brain conforms to the image and turns things right side up, but that is not how light normally reflects.
Brant Still Life Camera Obscura:
I had problems drawing the still life correctly, mostly because I couldn't see my paper but partly because I can't draw. The strongest parts of the reflection where the hand and the bottle, in fact those were the only objects visible at all. This could possible be due to the fact that they had the most surface area exposed directly to the light? At any rate, they were the brightest and most recognizable objects. Still, my sketch of them just looks like disfigured pancakes in space.
(image should be turned 90 degrees CCW)
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