A wind turbine, like any other tall structure, casts a shadow on the land around it.
If you live very close to a wind turbine, you will occasionally feel annoyed when its blades cut through the sunlight, cutting it into pieces and causing what is called a stroboscopic effect.
Therefore, depending on the inclination of the sun, these shadows can reach a range of several hundred meters, which makes this stroboscopic effect inevitable for those living near wind farms.
Faced with this effect, some people lose their balance or suffer from nausea, as with motion sickness or seasickness.
This phenomenon is due to the fact that the three position-perceiving organs (inner ear, eyes and muscle and joint receptors) are then at odds: the eyes perceive movement, while the ears and muscles do not. People with a personal or family history of migraine, or associated phenomena such as motion sickness or vertigo, are more susceptible to these effects. The strobe effect could also cause epileptic seizures.
In Lincoln Township, WI, two years after installation, 33% of people living between 250 m and 400 m from wind turbines considered blade shadow a problem, 40% between 400 m and 800 m, 18% between 800 m and 1.6 km, and 3% between 1.6 km and 3.2 km. (Sample of 230 people).
Indeed, even if they do not cause all the people interviewed such great concern, it is always embarrassing to see themselves deprived of lunch on their terrace by a sound and light show that they would have greatly dispensed with.