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  1. How we see is best understood by comparison with...

    How we see is best understood by comparison with a camera. The camera uses a shutter with a small, central opening to admit light. If the object is bright, the shutter closes the opening; if dim, the...
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    How we see is best understood by comparison with...

    How we see is best understood by comparison with a camera. The camera uses a shutter with a small, central opening to admit light. If the object is bright, the shutter closes the opening; if dim, the...
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