Definition: Whitishness, also known as white light or "white" light, is a color that appears when light passes through a transparent medium. The term originates from the fact that light can be perceived in various colors depending on the materials and properties of the medium it passes through. In the context of optics, whitishness refers to the appearance of light passing through an opaque medium (such as glass or plastic) due to the scattering of light by surface molecules such as water. This phenomenon is