My office in midtown Manhattan gets reflected sunlight off an adjacent tower in golden hour this time of year. When conditions are just right that system someho

My office in midtown Manhattan gets reflected sunlight off an adjacent tower in golden hour this time of year. When conditions are just right that system somehow forms a Schlieren imaging system [0] and the variations in air density outside the window is projected on the wall above my desk. My cofounder's gotten used to me flicking the lights off every time I notice the light lining up the right way. [0] https://en.wikipedia.org/wiki/Schlieren_imaging https://en.wikipedia.org/wiki/Schlieren_imaging