Final Exam Review - New material only (CHEM 3330 F24)

Front

Why is a simple visual comparison of fiber colors not always reliable?

Back

Factors include: 1) Simultaneous contrast effect alters color perception based on lighting and background. 2) Metameric colors can match in one lighting but not in another. 3) Human visual analysis can vary between individuals.

Front

Is all fabric woven?

Back

FALSE - Not all fabric is woven; some are knitted or non-woven.

Front

What shape are beard and mustache hairs often characterized by?

Back

Thick and triangular shape.

Front

Where in the hair is pigment located?

Back

In the cortex.

Front

What does significant oxidation and stretching of a headlight filament indicate about its state when broken?

Back

The headlight was likely ON when it was broken.

Front

What is the simultaneous contrast effect?

Back

It is a phenomenon where the perception of colors is affected by surrounding colors, leading to different appearances under varying conditions.

Front

Define metameric colors.

Back

Metameric colors are colors that appear to match under one lighting condition but differ under another.

Front

What are the three main parts of a hair strand?

Back

The three main parts are the cuticle, cortex, and medulla.

Front

What is the role of the cortex in hair?

Back

The cortex contains the pigment that gives hair its color and provides strength.

Front

What is the significance of filament oxidation in forensic analysis?

Back

Oxidation can indicate whether a light source was on or off at the time of an incident.