In the picture below you can see that the rolling shutter moves downwards...i.e., it exposes the light to the sensor from top to bottom.
So the information that the sensor recieves is a bit earlier at the top of the sensor and at the bottom it is a bit late..
But the image is flipped(inverted) by the time it reaches the sensor...
so the sensor recieves lower part of the image earlier than the upper part..
But in this image below...as you can see the shadow of the cork appears even before the cork had come out ...this means that the upper part of the image reached earlier than the lower part....how is this possible..??
I'm new here...I'm really sorry if i went wrong anywhere....I hope you answer my question...