When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight. A clear cloudless day-time skyis blue because molecules in the air scatter blue light from the sun more than they scatter red light.
Sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.