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In Reply to: Actually we can visualize four dimensions, time posted by NonObvious on January 08, 2001 at 15:33:56:
Back to the movie screen... Each frame is a static picture, no motion. By viewing them rapidly in succession, we perceive motion although the only thing that changes from the static picture is the element of time.
For the record, my (naive) stance is that time is not the 4th dimension. or even a dimension at all. anything different is too much for my tiny brain to comprehend.
maybe i don't understand exactly what you mean by seeing things move. Are you referring to the sense of sight alone? or in combination with cognition?
Just follow your reasonsing a little further, and you will realize we can visualize four dimensions, or am I the only one who can see things move?
IMHO, we can only visualize TWO dimensions. Everything appears visually in 2 dimensions. However, we can perceive the third dimension through cues (time, focus, color, object familiarity).
For example, if we look at one face of a cube, we see a square. (Really, depending on perspective, we see a square within a square with each of the nodes connected by a line to its corresponding node). If we move in the X plane only, we can see a two rectangles, one skinny one and one squarish one. As we continue to move around the cube (or rotate the cube, if you rather)the sizes of the rectangles change. Through object familiarity and time-lapse, we perceive the cube.
However, at any given INSTANT in time, we can only SEE two dimensions. We extrapolate the third.
It is this ability that allows us to become involved in a movie, a three-dimensional world projected on a flat screen.
when we have six senses?
I haven't been keeping up on my reading. Ask me a question. Preferably science related.
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