why the sky is blue?

The sky appears blue because the Earth ' s atmosphere sc at ters sun light in all directions and blue light is scattered more than other colors because it travel s as shorter , smaller waves . This is why the sky appears blue during the day time , when the sun is high in the sky and the light has to travel through more of the Earth ' s atmosphere to reach us . At night , when the sun is lower in the sky , the light has to travel through less of the atmosphere , so the sky appears more orange or red . </s>