Quotation

The sun was about to set and guests waited, hoping for the green flash. It was caused when an atmospheric change in air density created a bending of the light when it crosses from cool to warm, as in a giant prism. Blue and green refract more than red and yellow, the blue scattering more vigorously, and if the green is properly positioned, the red fireball may permit a magnified rim of burning emerald as it drops into the sea. Hence, the green flash. Ambrose had heard of the Scottish legend that promised love and eternal happiness to all who sighted the green flash. It was a lovely thought.