GATE (TF) Textile 2022 Question Paper Solution | GATE/2022/TF/25

Question 25 (Textile Technology & Fibre Science)

If the reflectance of a dyed fabric at \lambda _{max} is 10 %, then the colour strength value (K/S) of the dyed fabric (correct up to 2 decimal places) is ___.

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Given in the question-

Reflactance of the dyed fabric(R)=10%

Then,color strength value(K/S) of the dyes fabric=?

By formula-


\frac{K}{S}=\frac{(1-10)^2}{2\times 10}



\frac{K}{S}=4.05 (Ans)

Frequently Asked Questions | FAQs

What is reflectance ?

Reflectance is the fraction of incident light or other electromagnetic radiation that is reflected by a surface. It is a measure of the ability of a material to reflect light, and is dependent on the material’s properties, as well as the angle and polarization of the incoming light. Reflectance is an important characteristic in a number of fields, including optics, lighting, and materials science.

What is colour strength ?

Color strength refers to the intensity or saturation of a particular color. It is a measure of how pure or vivid a color appears, and is determined by the amount of spectral color present compared to the amount of white light. The higher the color strength, the more vivid or intense the color appears. Color strength is a fundamental aspect of color perception, and is used in a variety of applications, such as graphic design, printing, and color matching.

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