How rainbow is formed

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Maybe sometimes we was looking a beautiful rainbow in the sky and surely there was someone who think about how rainbow is formed. In this presentation, we will know it could happened in the sky. Let's check it out!

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How rainbow is formed

  1. 1. Rainbow Rainbow is one of optic phenomenon that happens in the atmosphere of the earth naturally. We can see it at mountain range, or when it is cloudy, or when it is raining and rising of sun.
  2. 2. Shape of Rainbow As we know, we just can see it a half of circle form, but actually the rainbow is a circle form. We can see it perfectly, if it is seen by standing in the high place like in the air plane or standing on top of mountain. It is real that rainbow is a circle form not like parabola form. On the ground, we can not see it perfectly but only half of circle form.
  3. 3. Interestingly, the location of the rainbow totally depends on the position of the person who can see it, and on the position of the sun relative to that person. If the sun is shining towards your eyes, you will never see a rainbow. The sun needs to be behind you, so you will never be able to see a rainbow and the sun at the same time.
  4. 4. How this is happened ? Light from the sun enters the raindrops, and because the density of the rain water is different from the density of the air, the sunlight refracts, that is, it bends slightly. When the light bends, it splits into a spectrum of colored light because different colors of light refract at slightly different angles.
  5. 5. Some of this colored light is reflected back off the internal surface of the raindrop, similar light is refracted by the water and reflected on the mirror in the water. When we see this reflected light, the reason that we see each color separately is that each color of light bends back out of the raindrop at a slightly different angle.
  6. 6. So we see all red light at an angle of 42 degrees between us and the sun, and all violet light at an angle of 40 degrees between us and the sun and the other colors at angles between 40 and 42 degrees. You can see a diagram of how this works in this right side
  7. 7. Thank You  so much Created by: Achmad Bhayqunny

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