Why is black hotter then a white tshirt?

Black absorbs more wavelengths of light than white, which reflects most of the light that hits it. When sunlight or other light sources hit a black T-shirt, the material absorbs this energy and converts it into heat, making it feel warmer. In contrast, a white T-shirt reflects most of the light, resulting in less heat absorption and a cooler feel. This difference in light absorption is why black clothing tends to be hotter than white.