The rainbow doesn't actually "land" anywhere because it is not a physical object. Instead, a rainbow is an optical illusion that appears to form a colorful arc in the sky when sunlight is refracted, or bent, by water droplets in the air.

To see a rainbow, you need two things: sunlight and raindrops. When sunlight shines into the rain, it refracts, or bends, as it enters the water droplets. The different colors of light that make up white sunlight (such as red, orange, yellow, green, blue, indigo, and violet) are refracted at slightly different angles, causing them to spread out and form a spectrum of colors. When this refracted light exits the raindrop, it forms an arc of colors that appears to be suspended in the air.

The location of the rainbow in the sky depends on the position of the observer in relation to the sun and the rain. A rainbow always appears opposite the sun in the sky, so if the sun is low in the sky, the rainbow will appear higher in the sky, and if the sun is higher in the sky, the rainbow will appear lower in the sky. The center of the arc of the rainbow is directly opposite the sun, and the size of the arc depends on the height of the sun in the sky and the size of the raindrops.
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