Purple Mountains-2

7 Purple Mountains-2 “ Get in the car, " says Josh's dad. “ Let's go to the mountains. " They drive to the mountains. As they get closer, they see that the mountains are not purple anymore. “ Oh, I see, " says Josh. “ But why?" “ From far away, the light scatters, making the mountains look purple, " says his dad. “ Cool, " says Josh. “ Let's drive home and make them purple again! "

Why are the mountains not purple up close?