Make some observations
1. What are the different colors in sunlight? How can you break apart sunlight into the different colors?
2. What are the colors you’ve seen in sunsets and sunrises?
3. Looking at the visible spectrum of light, do the colors in sunsets and sunrises have short or long wavelengths?
Since particles in the air scatter smaller wavelengths more, blue scatters more than red or orange, which is why the sky appears blue. If you look close to the horizon, the sky becomes lighter blue or white because the blue light is being entirely scattered away.
In the figure, what time of the day does the light from the sun have to travel through more of the atmosphere to reach our eyes?
At what time will more light scatter?
Which color of light do you think is more transmitted and what color is more scattered at sunsets (at 6 pm in the figure)? What is happening to the blue light?