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

In aerial and satellite imagery, dry sand has high reflectance in the visible spectrum due to its light color and loose texture.
When captured in black-and-white or panchromatic imagery, high-reflectance surfaces appear lighter.
Therefore, dry sand usually appears as a light shade of grey, helping distinguish it from darker surfaces like wet soil or vegetation.
Hence, option (D) is the correct answer.