Which statement is true when considering color in a fiber?



the color is measured using an FTIR


the color depends upon the lighting source


the color is always a result of a pigment in all fibers


there are very few color dyes that can be used for fibers


none of the above are true

the color is measured using an FTIR

The statement "the color depends upon the lighting source" is true when considering color in a fiber.

To determine which statement is true when considering color in a fiber, we need to evaluate each option.

1. "The color is measured using an FTIR": This statement is not true. FTIR (Fourier-transform infrared spectroscopy) is a spectroscopic technique used to analyze the functional groups and chemical composition of a material, but it is not typically used to directly measure color.

2. "The color depends upon the lighting source": This statement is true. The appearance of color in a fiber can vary depending on the lighting conditions under which it is observed. Different lighting sources, such as natural daylight or artificial light, can influence the perceived color of the fiber.

3. "The color is always a result of a pigment in all fibers": This statement is not true. While pigments can contribute to the color of some fibers, not all fibers rely on pigments. Many fibers, especially natural fibers, derive their color from natural components such as dyes or inherent pigmentation.

4. "There are very few color dyes that can be used for fibers": This statement is not true. There are numerous color dyes available that can be used to dye fibers across a wide range of colors. These dyes can be synthetic or derived from natural sources.

Based on the evaluation, we can conclude that option 2, "the color depends upon the lighting source," is the true statement when considering color in a fiber.