Answer: it slows down, it bends when entering the glass and it separates into colors.
Explanation: In 1672, Sir Isaac Newton found that white light could be separated into a band of colors. By passing light through a prism, he was able to separate the colors of the rainbow. The band of colors into which light is separated is called the spectrum. The colors of the light spectrum are always in the same order. Red is the longest wavelength; violet the shortest. The colors in order of appearance are red, orange, yellow, green, blue, and violet. Sunlight or white light is a mixture of these colors.