Persian Lamb Wool
This is a photograph of the prepared "Persian Lamb" slide from the Cargille Hair Standard set. The plane of focus is the
center of the hair. Both a white and a dark hair are in this photograph.
Transmitted Crossed Linear Polarized Light
Significance in the Environment:
Wool has a refractive index along its length of about 1.56 and perpendicular to its length of about 1.55.
It has a birefringence of about 0.01 and a positive sign of elongation.