After Noah’s Ark and the flood, Genesis says God placed a rainbow in the clouds as a sign of the covenant. The covenant promises that a flood will not again destroy all life on earth in the same way.
Genesis 9 presents the rainbow as a visible reminder involving God, Noah, his descendants, and every living creature. The passage therefore gives the rainbow a theological meaning beyond its physical appearance: it represents a promise and a continuing relationship between the divine and the living world.
The rainbow is not introduced as a newly created natural phenomenon in the text. Instead, it is assigned a covenantal role as a sign. Modern science explains rainbows through the refraction, reflection, and dispersion of sunlight in water droplets, while the Genesis narrative explains its symbolic significance.
Because of this story, the rainbow became one of the most recognizable images associated with Noah. It also appears in later religious art, literature, children’s books, and popular depictions of the Ark.