The Blue Sky

B : Joe asked me something about science just now. But I didn’t know the answer. G : I’m good at science. Ask me. B : OK. Why is the sky blue? G : I’ll explain it in a simple way. Light comes through the air from the sun in waves. B : The light is in many colors, right? G : Right. Blue light waves are smaller than air molecules. They sometimes get absorbed by these molecules. B : OK. What happens then? G : Then the blue light waves scatter in many directions. Your eyes see this blue light from above you, after it leaves the air molecules. B : So that is what makes the sky blue! What happens to the other colors? G : They reflect off the things that they hit. Your shirt is red because our eyes see the red light reflected from it. B : Now I understand why the sky is blue!