spectral reflectance

Spectral reflectance describes how much light a surface reflects at specific wavelengths or colors within the electromagnetic spectrum. It varies for different materials—some reflect more in certain colors and less in others—giving each surface a unique "spectral signature." By analyzing this pattern, scientists can identify materials, monitor plant health, or assess environmental conditions. Think of it as a detailed fingerprint based on how objects reflect sunlight or artificial light across various colors. This information helps us understand the composition and state of surfaces without physical contact or visible inspection.