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Are all rainbows round?
No, rainbows form a full circle, but we only see a semicircle due to the horizon blocking the bottom half. The shape of a rainbow depends on the observer's position relative to the sunlight and water droplets that create it.
Do rainbows have an end?
No. A rainbow is really a circle. You can only see part of it when you're on land, but if you happen to see one below you while you're in an airplane, you can often see the full circle.
When viewed from above rainbows are what shape?
When viewed from above, rainbows appear as a full circle, but due to the earth's horizon blocking the lower half, we typically see them as arcs.
Can rainbows make a full circle?
Not if you're on relatively flat ground. The rainbow you see can be a complete circle if you're on a high place looking down into a valley, or if you're looking down out of an airplane.
Are rainbows endless?
Rainbows are actually full circles, but we usually only see a portion of them due to the horizon blocking the rest. However, if you were to get a vantage point high enough, such as from an airplane or a tall mountain, you could potentially see the full circle of a rainbow.
