Do you know why we can see a rainbow in a sunny rainy day? Do you know what a color is?
Do you know why we can see a rainbow in a sunny rainy day? Do you know what is a color? Have you ever thought are white and black colors? Have you ever wondered what color will a green apple appear to be when viewed through red and green glasses respectively? Can you tell what colors are produced by a light source by just looking at the light? What kind of instrument do you need to separate the colors to see them? If not, this activity will bring you closer to the answers.
Visible light is the only electromagnetic energy that the human eye can see. White visible light is composed of a group of electromagnetic wavelengths that make up the colors we see. Each color within the visible light spectrum has its own individual wavelength and frequency. For example, red light has the longest waves and violet light has the shortest waves. Like a prism, the diffraction grating and CD can be used to break light into a spectrum. But why different object appear a certain color? Well, it happens because they absorb (or subtract) all the visible light colors except the color that is reflected back to your eye.