Rainbows show up and vanish because of the refraction, scattering, and impression of daylight by raindrops in the environment. This is the way a rainbow frames and disappears: 1. **Sunlight Entering Raindrops**: A rainbow starts when daylight, which is comprised of different tones (range of noticeable light), enters raindrops in the climate. Each variety in daylight has an alternate frequency. 2. **Refraction**: When daylight enters a raindrop, it goes through refraction, which is the twisting of light as it passes from one medium (air) into another (water). This bowing happens on the grounds that the speed of light changes when it moves from air into denser water. 3. **Dispersion**: As the light keeps on going inside the raindrop, it likewise goes through scattering. Scattering is the detachment of light into its singular tones (range). The various shades of light are refracted by differing sums, making them spread out. 4. **Reflection**: After scattering, the light glistens off within surface of the raindrop. This reflection happens on the grounds that within surface goes about as a mirror. 5. **Refracted Again**: The light then leaves the raindrop out of sight. As it leaves, the various shades of light are refracted once more, twisting as they move from the denser water once more into the less thick air. 6. **Formation of a Circle**: The shades of light are presently fanned out in a roundabout example, shaping a round trip of varieties. Be that as it may, the ground deters the base portion of this circle, so we generally see a semi-roundabout rainbow. 7. **Viewing Angle**: To see a rainbow, you should be remaining with your back to the sun, looking toward the area where raindrops are available. The light from the raindrops enters your eyes, and you see the delightful bend of varieties. 8. **Size of Water Drops**: The size of the raindrops likewise influences the size and splendor of the rainbow. Bigger raindrops make bigger, more clear rainbows. 9. **Disappearing Rainbow**: A rainbow will seem when the ok circumstances are met, yet it can vanish when these circumstances change. Assuming that the downpour stops or on the other hand if the point between the approaching daylight, raindrops, and your survey position changes altogether, the rainbow will evaporate. Rainbows are optical peculiarities that require explicit circumstances to happen, including the presence of raindrops and daylight. While they appear to show up and vanish, they are dependably there; it's simply a question of your review point and the air conditions.