III. Six Books on Light and Shade: 214.
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III. Six Books on Light and Shade: 214.
214.
No small hole can so modify the convergence of rays of light as to prevent, at a long distance, the transmission of the true form of the luminous body causing them. It is impossible that rays of light passing through a parallel [slit], should not display the form of the body causing them, since all the effects produced by a luminous body are [in fact] the reflection of that body: The moon, shaped like a boat, if transmitted through a hole is figured in the surface [it falls on] as a boatshaped object. 102 Why the eye sees bodies at a distance, larger than they measure on the vertical plane?.
On gradation of shadows (215. 216).
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