Genesis 9:12-16 And God said, “This is the sign of the covenant I am making between me and you and every living creature with you, a covenant for all generations to come: I have set my rainbow in the clouds, and it will be the sign of the covenant between me and the earth. Whenever I bring clouds over the earth and the rainbow appears in the clouds, I will remember my covenant between me and you and all living creatures of every kind. Never again will the waters become a flood to destroy all life. Whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between God and all living creatures of every kind on the earth.”For you to see a rainbow in the sky, you need rain and the sun behind you. The suns parallel rays pass through the raindrops and light is refracted back to you in the colours you see at an angle of 42° from the entry point of the ray into the droplet. The bow is caused by the way the light is refracted within the spherical nature of the raindrops. You only see half the circular shape because the Earth gets in the way of the other half.
If we have a scientific explanation, does that negate the biblical explanation for rainbows?