Question

Identify the correct tone for dry sand in visible spectrum.

• A. Black
• B. Dark shade of grey
• C. Green
• D. Light shade of grey

Hint:

Bright, dry surfaces usually appear light grey or white in visible spectrum imagery.

Answer 1

The Correct Option is D

Dry sand exhibits high reflectance in the visible spectrum of aerial and satellite imagery due to its pale color and uncompacted structure. When rendered in black-and-white or panchromatic formats, surfaces with high reflectance are depicted as lighter tones. Consequently, dry sand typically presents as a pale grey hue, facilitating its differentiation from darker materials such as moist earth or plant life. Thus, option (D) is the appropriate selection.