[lord lucan]

Taken from Google
There are multiple matches for the study of white triangles, including:
GPS stations
White triangles on a map can represent GPS stations that are used for geodetic applications and monitoring
earthquakes. Geodesy is a geoscience that has improved the capabilities of GPS over the years.

Subjective contours
Observers often report seeing a white triangle superimposed on a black outline triangle and three circles. This is
an example of subjective contours, which are relationships between brain states or subjective experiences and
perceived physical properties of a stimulus.

Upskirts
Watching girls who are careless when sitting down and showing off their white panties