PeskyPeater
Member
oke then there was indeed refraction at play, while mr Skiba thought he had excluded that possibility in his setup. he was actually zooming in over the bulgeAir close to the surface will generally be warmer than air higher up because the surface water/ice/soil/stone will have a higher heat capacity than air (air will cool more quickly). The resulting temperature gradient would still be present in winter, so refraction can't be ruled out. In general, designing an experiment that controls for both refraction and beam divergence seems difficult for the layman.
Last edited: