Polarimetry Experiment

Topics covered:
- Find the rotation angle θ
- Verify Biot's law
- Perform a calibration α=f(C) 

Principles and objectives:
Polarimetry or the study of optically active substances allows to reconcile chemical properties and optical properties. The instrument generally used to measure a deviation of polarization is a Laurent polarimeter.
In a penumbra polarimeter, we look for the penumbra angle θp which indicates the rotation of polarization related to the presence of the active solution.
The rotation angle θ of the tested substance is then:
θ = θp – θ0, where θ0 is the reference equi-penumbra angle and θp is that of the tested solution.

Composition:
 ▪ 1 prismatic bench of 2 m with adjustable feet set (ref.202233)
 ▪ 6 standard prismatic riders (ref.202234)
 ▪ 1 wide prismatic rider (ref.202235)
 ▪ 1 laser torch (ref.204080)
 ▪ 2 polarizers in graduated mount (ref.202374)
 ▪ 1 penumbra analysis in graduated mount (ref.202387)
 ▪ 2 polarimetry cells Øutile 40 mm - length 100 and 200 mm (ref.203379+203389)
 ▪ 1 white and gridded metal screen 20x20 cm (ref.202368)
 ▪ 1 set of experiment instructions