Which color is filtered out first as a diver descends deeper into water?

As a diver descends deeper into water, light is absorbed by water, and different colors of the light spectrum are filtered out at different depths. Red light has the longest wavelength among the colors visible to the human eye, making it the first color to be absorbed by water. As divers go deeper, the red wavelengths are absorbed quickly, causing objects to appear more blue or green in the deeper parts of the water. This phenomenon is due to the way light travels through water and how it interacts with water molecules, allowing shorter wavelengths like blue to penetrate deeper than longer wavelengths like red. Thus, the correct answer relates directly to the natural filtering effect of water on light spectrum colors, with red being the first to go as the diver descends.