Multi-spectral refers to the ability to capture and analyze data across multiple wavelengths of light, beyond just the visible spectrum. This technology is commonly used in fields like remote sensing, where satellites or drones collect information about the Earth's surface by detecting various wavelengths, including infrared and ultraviolet. In agriculture, multi-spectral imaging helps farmers monitor crop health by identifying stress or disease that may not be visible to the naked eye. By analyzing the different wavelengths reflected by plants, farmers can make informed decisions about irrigation, fertilization, and pest control, ultimately improving yield and sustainability.