On 6/17/2018 10:41 PM, Bruce Kellett wrote:
But the lens doesn't send one color to one photoreceptor and another
color to a different photorecptor. It focuses a spot of light on
several photorecptors and the one with the right pigment fires its
neuron. So it is energy detection.
But if you use a different position basis the lens will no longer
focus point objects to points on the retina.
I don't know enough about the physics of calorimeters as used in HEP
to comment here. But if temperature changes are measured by bimetals
or strain gauges, position comes into it in an essential way.
Most work by measuring a voltage. But you miss the point. Those
position measurements are not essential in the QM sense. They are
just changing one classical value into another. Temperature is the
first classical level.
Fair enough. I suppose I am just very conscious of the fact that in a
different position basis all of this physics will be very different.
The classical universe will not look the same at all.
I guess I don't understand your idea of "position basis". My
understanding of linear algebra is that any basis that spans the space
can be used to represent any relation between structures. Why should
choosing a different basis make any difference to the physics aside from
the simplicity of its representation. It's just a coordinate basis in
Hilbert space. Or are you thinking of bases different from position,
e.g. momentum, energy, live/dead,...
Brent
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