Canada Trip

Rod and Brenda left for Toronto and then drove to Guelph, Ontario for Rod's meeting of the American Association of Physics Teachers. On the flight up, we flew through a lot of clouds and were in position for Rod to photograph the glory around the plane's shadow. At left, the cloud is distant, and the plane shadow is a tiny dot. At right, the cloud is closer so that the plane shadow is larger. To the eye, the rainbow-colored ring around the plane shadow is the same size for close and distant clouds if the droplets forming the cloud are the same size.