To determine which color of light has the longest wavelength, we need to consider the visible spectrum of light.$\\$The visible spectrum ranges from violet to red, with violet having the shortest wavelength and red having the longest wavelength.$\\$The order of colors from shortest to longest wavelength is:$\\$• Violet$\\$• Blue$\\$• Green$\\$• Yellow$\\$• Orange$\\$• Red$\\$Therefore, among the given options, red light has the longest wavelength.$\\$The correct answer is Option 1: Red.