The reflectivity of silver depends on the wavelength of light and the surface texture of the silver. In the visible spectrum, silver has a high reflectivity of over 95% for most wavelengths. This means that it reflects over 95% of the visible light that hits its surface. In the near-infrared spectrum (NIR), the reflectivity of silver is lower, around 80-85%. In the ultraviolet (UV) spectrum, the reflectivity of silver is even lower, around 60-70%.

The surface texture of silver also affects its reflectivity. A smooth, polished silver surface will have a higher reflectivity than a rough, textured silver surface. This is because the smooth surface reflects light more evenly, while the rough surface scatters light in different directions.

Silver is a good reflector of light because it has a high electrical conductivity. This means that electrons in the silver atoms are free to move easily, and they can respond to the oscillating electric field of light waves. The electrons in the silver atoms absorb the light energy and then re-emit it in all directions, resulting in a high reflectivity.