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Old Nov 29th 2017, 06:45 AM   #1
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What did the shape prove?

Newton made a circular hole but the shape of the spot on the wall was oval, not circular. What did that prove?
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Old Nov 29th 2017, 03:33 PM   #2
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I'm not sure what you are referring to. Could you post a link to this 'experiment'? It sounds to me like a situation in which the circular hole is at an angle to the screen on which the light appears. The fact that the image is an ellipse implies that the light passes through the hole and to the image in straight lines.
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Old Nov 29th 2017, 07:20 PM   #3
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I think this may be it ...



The sun light shone though a circular hole , hit the prism , and produced many circles of colour , but offset , giving an oval shape.

It proved that white light can be split into colours with a prism ..

We are more familiar with a slit of light hitting a prism.....


Last edited by oz93666; Nov 29th 2017 at 07:29 PM.
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