Sorry for my english but, to explain, the N95's camera doesn't work like a usual camera or video camera but like a scanner. It scans from the left to the right (or the top to the bottom)so he just takes a little part of the blade before moving and take a new one. Here, the blade'speed is exactly a the good frequency. It's almost the same when you see a car's wheel which looks to stop or turn on the other way depends of the car'speed.
Not exactly sure but it most likely has something to do with the camera's frame capture rate and it's precision. It tries to accurately capture the moment but since the blades are spinning so fast all it gets to capture are those tiny bits that look like they're floating downwards.
That is what keeps planes in the air - fuel mass is discarded as virtual propellers, which evaporate before they hit the ground. The Nokia is fast enough to capture this.
You will notice that whenever aircraft crash, the propellers are frozen into the weird bent shapes like this that they normally assume during flight. Why else do you think propellers look so blurred? It is not from the speed - you can see much faster things without blurring, such as a military jet going faster than sound, and they are clear.
Comments (16):
thats so damn crazy !
Here, the blade'speed is exactly a the good frequency.
It's almost the same when you see a car's wheel which looks to stop or turn on the other way depends of the car'speed.
rolling shutter effect
You will notice that whenever aircraft crash, the propellers are frozen into the weird bent shapes like this that they normally assume during flight. Why else do you think propellers look so blurred? It is not from the speed - you can see much faster things without blurring, such as a military jet going faster than sound, and they are clear.