Spectral Reflectance
Objects having different surface features reflect or
absorb the sun's radiation in different ways. The
reflectance properties of an object depend on
the particular material and its physical and
chemical state (e.g. moisture), the surface
roughness as well as the geometric
circumstances (e.g. incidence angle of the
sunlight). The most important surface features
are color, structure and surface texture.
Look at the image on the left, can you tell the color of
the rose if the image is taken at a wavelength
range between 0.6-0.7 micrometers.