how thus a rainbow appear in the sky give an 5 lines answer
Answers
– when making the rainbow – sunlight is emerging from many raindrops at once. A rainbow isn’t a flat two-dimensional image on the dome of sky. It’s more like a mosaic, composed of many separate bits … in three dimensions. More about the three-dimensional quality of rainbows below. Just know that your eye sees rainbows as flat for the same reason we see the sun and moon as flat disks, because, when we look in the sky, there are no visual cues to tell us otherwise.
For you to see a rainbow you must be at an angle of 40 to 42 degrees between rain drops in front of you and the sun in your back. The different frequencies of visible light reflect in the water drops back to you at different angles within these 40 to 42 degrees; red at about 42 and blue at the far side of the visible spectrum at about 40 degrees. The rest of the colors sit in between. This causes the rainbow to appear in front of you.
Why is the red color on top of the primary bow? As said, blue light bends higher up and soon gets out of your view as are the other colors. In the end it is the red light that is is still visible (it bends up less) and looks as if it is on top (the other colors are actually out of sight). The drops on the outer edge of the rainbow are at just the right angle to reflect their lower red light towards you as if it is on top of the bow.