If white light hits a yellow filter, what will be the result?

When white light passes through a yellow filter, the result is that yellow light is transmitted through the filter. A yellow filter works by absorbing other colors of light, particularly those in the blue and violet parts of the spectrum, while allowing yellow (and some red and green) wavelengths to pass through.

This phenomenon occurs because the filter is made of materials that have a specific color absorption property. It selectively absorbs the wavelengths that do not correspond to yellow, thus leaving primarily yellow light to emerge on the other side. Therefore, when white light, which contains all colors of the spectrum, interacts with the yellow filter, the light that comes out is primarily yellow, as the filter allows only those wavelengths to be transmitted.

In this process, not all colors are absorbed completely; rather, it's specific wavelengths that the filter can absorb, which accounts for the yellow light being visible afterwards.