[Ralph Barone[_3_]]

wrote:
Scott Dorsey wrote:
================

This is the basic principle that makes bandpass speaker enclosures do
what they do. You don't need to put that one bass note into it... any
bass going into it will come out as that one note.

** Filters do NOT do frequency shifting.

Don't think of it as frequency shifting.

** Fraid I cannot do that, double think does not come naturally to me.

Think of it as a mass-spring system.

** That is your dumb mistake.



...... Phil


Explain Raman spectroscopy then. Hit a sample with light from a
monochromatic laser and light at different (non-harmonically related)
frequencies comes back.