This phenomenon is known as additive and subtractive color mixing. When red, green, and blue light overlap, they combine to create white light, demonstrating additive mixing. However, when a slit is used to block parts of this white light, subtractive color mixing occurs as specific wavelengths are filtered out. The slit acts as a filter, allowing only certain colors of light to pass through. This selective filtering leads to shadows formed by the absorption of specific wavelengths, resulting in