The sun is going down, and most of the land is dark, but we can see silhouettes and outlines of objects because some light is still the atmosphere.

The Sun is going down, and most of the land is dark, but we can see silhouettes and outlines of objects because some light is still scattered the atmosphere. When sunlight reaches Earth's atmosphere it is scattered in all directions by all the gases and particles in the air.Blue is scattered more than other colors because it travels as shorter, smaller waves and is scattered in all directions.

50 inches should be the resultant vector