Question

Clouds appear white in optical visible spectral bands of remote sensing images due to _________ scattering.

• A. \( {Rayleigh} \)
• B. \( {Mie} \)
• C. \( {selective} \)
• D. \( {non-selective} \)

Hint:

Non-selective scattering happens when particle sizes are larger than the wavelength of light, such as water droplets in clouds, leading to uniform scattering across all visible bands and causing clouds to appear white.

Answer 1

The Correct Option is D

In remote sensing, clouds appear white in the visible spectral bands primarily due to non-selective scattering.
This type of scattering occurs when the particles responsible for scattering (such as cloud droplets or fog) are much larger than the wavelength of the incident light.

Non-selective scattering affects all visible wavelengths equally,
hence all the colors of visible light (red, green, and blue) are scattered nearly uniformly.
The result is the perception of white color, which is a combination of all visible wavelengths.