Optical Activity For Different Colors
by GIPhotoStock
Title
Optical Activity For Different Colors
Artist
GIPhotoStock
Medium
Photograph - Photograph
Description
Optical activity for different colors. Chiral molecules (eg sugar) cause rotation of the plane of the linearly polarized light when it passes through the sample. Optical activity of sugar is demonstrated by placing a beaker with corn syrup on top of an iPad. Its LCD screen acts a source of linearly-polarized light. An analyzer (linear polarizer) is placed on top of the beaker. First the analyzer is rotated so that minimal amount of light passes from the screen and through the analyzer, BUT NOT through the sample. Then the analyzer is rotated so that minimal amount of light passes through the sample AND the analyzer (result shown here for red, green and blue colors). The difference between the two analyzer positions is the rotation angle. Note that the rotation angle is wavelength-dependent, it is smaller for longer wavelengths (red) and larger for shorter wavelengths (blue).
Uploaded
September 29th, 2014
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