No, no one has ever touched a rainbow.
Rainbows are optical phenomena caused by the refraction and reflection of sunlight through water droplets. They aren't physical objects that exist at a specific location that you can reach out and touch.
Here's why touching a rainbow is impossible:
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Rainbows are light: A rainbow is simply the visual effect of light interacting with water droplets. Different colors in a rainbow are light waves with different wavelengths. You can't "touch" light itself.
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Dependent on the observer: The position of a rainbow is dependent on the observer's location relative to the sun and the water droplets. As you move, the rainbow appears to move with you. This is because the light is being refracted and reflected to your eyes from different water droplets. What appears as a rainbow to you is a different set of interactions than what another person sees.
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No fixed location: Since a rainbow is created by light, it doesn't have a fixed location. It's an optical illusion that exists only as long as the conditions (sunlight and water droplets) are present. Walking towards where a rainbow appears to be just means you are encountering different water droplets interacting with the sunlight.
In essence, attempting to touch a rainbow is like trying to touch an image in a mirror – it's an illusion created by the properties of light.
