What Have you ever wondered why the sky is blue?

 Sunlight is white. This means that it has red, orange, yellow, green, blue and purple colors. The light waves given by blue and purple rays are smaller and bend more easily with a straight line than long waves. The dust and moisture in the air divert and scatter the blue and purple rays. This makes it easier for us to see these colors clearly in comparison to other colors and that is why we see the same blue.

 

Yale's experience shows you how blue and purple rays bend and scatter. Fill a glass with water. Add a few drops of milk. Milk will represent air dust and moisture.

Now darken the room and bring it near the bright flashlight. Look at the glass at a 90 degree angle to one side of the flashlight. The water will look blue. Why do milk particles scatter small blue rays in the light of a flashlight .