Yak Hair
                This is a sample yak hair from the sample-set provided by
                  Textile Fabric Consultants, Inc.
                
              
              
                Transmitted Crossed Linear Polarized Light
                
Definition/Function:
                Significance in the Environment:
                Characteristic Features:
                Yak hair 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.
                Associated Particles:
                References: