Question

Given below are two statements
Statement I: 'Hue' is a measure of the chromatic composition of light
Statement II: The Munsell system is based on five principal hues
In light of the above statements, choose the correct answer from the options given below

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Hint:

In soil science, Value measures "lightness" (black to white) and Chroma measures "purity" or intensity. Gleyed soils often have neutral hues and low chromas.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Soil color is determined using the Munsell Color System, which uses three variables: Hue, Value, and Chroma.

Step 2: Detailed Explanation:
Statement I is true. "Hue" refers to the dominant wavelength of reflected light. It represents the actual color (e.g., Red, Yellow, Green) and is thus a measure of the chromatic or spectral composition of the light reflected from the soil surface.
Statement II is true. The Munsell color wheel is traditionally based on five principal hues:
1. Red (R)
2. Yellow (Y)
3. Green (G)
4. Blue (B)
5. Purple (P)
Additionally, there are five intermediate hues (YR, GY, BG, PB, RP), making a total of 10 major hue groups. In soil science, the most commonly used hues are Red (R), Yellow-Red (YR), and Yellow (Y) due to the presence of various iron oxides like hematite and goethite.
The notation is written as Hue Value/Chroma (e.g., 10YR 5/4).

Step 3: Final Answer:
Both statements regarding the technical definition of hue and the structure of the Munsell system are correct.