Green Egghead wrote:
. . .
Karo brand corn syrup has an interesting property.
It will rotate the linear polarization of light passing through it
by different amounts depending on the frequency.
This can easily be seen by placing a small jar of
Karo syrup between to linear polarizers and rotating
them. Different angles between the linear polarizers
will result in a different color being seen in the Karo jar. . .

Dextrose (for right) and levulose (for left) -- aka glucose and
fructose, the components of sucrose, ordinary table sugar -- are named
for the direction in which they rotate the polarization of light.

Roy Lewallen, W7EL