Aleksandar S. answered 04/17/21
My main hobby for the last decade and my work as well
This is something similar to rolling shutter and those famous old photos on which racing cars are skewed.
The problem was forgotten for many years with mechanical shutters but re-appeared with electronic shutters, because not all the pixels are read at once.
If you are on sunlight - there is no problem, Sun is shining in continuous manner
However, if you want to take a photo of a lightbulb, it will flicker at the frequency of 50/60 Hz. Some LED screens will flicker as well, it all depends how good electronics is to "flat out" the flickering.
Now, because your image will be created by reading line by line on the camera sensor, some parts will capture the lightbulb when it's in full power mode, while the others will capture the weak light.
The result is - bending
Solution 1: buy a camera with faster readout (technology is still not there)
Solution 2: use mechanical shutter (if you can)
Solution 3: make them (sensor and light) flickering at the same frequency - that's "software based" anti-flickering