Which of These is Not a Cross Sectional Shape?
Hollow
Eliptical
Cylindrical
Fragmented
Trilobal
Which of the Following Would You Look For in a Natural Fibre?
Uneven Width
An Unusual Cross Sectional Shape
Irregular Surface
Scaly Appearance
The Presence of Delustrants
Smooth Surface
Interference Colours Viewed Under Polarising Light Microscopy Are Best Seen on White Fibres.
Interference Colours Give a Good Indication of the Type of Fibre Being Examined. A 1st Order Fibre is Likely To Be....?
Polyester
Acetate
Nylon
The Michel-Levy Chart is Used for Colours Seen With a Red Compensator Plate.
What Analytical Techniques Would You Use on Fibres?
Micro - Spectrophotometry
Thin Layer Chromatography
Infra-Red
Gas Chromatography
GC - Pyrolysis
Physical Fit
Which of These Illumination Types Would You Use in Fibre Examination?
Bright Field Illumination
Crossed Polars Illumination
UV Light Illumination
Blue Light Illumination
The Equation to Calculate the Refractive Indices of a Fibre (n) is: n = (speed of light in vacuum/speed of light in fibre).
Birefringence = (Optical path difference/thickness of fibre in micrometers).
What is the Meaning of Anisotropy?
Light Travels at Different Speeds in Different Directions in the Fibre.
Light Travels at Different Speeds in the Same Direction in the Fibre.
