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The stroboscopic effect can cause the image of a wheel (let us say with many spokes) to appear to be turning at a different speed and even backwards.
If succeeding images of a wheel with 12 spokes are taken when the wheel has made , say one eleventh of a turn, just less than enough of a portion of a revolution to bring one spoke where another spoke had been previously, the wheel will appear to rotate slowly backwards.
What else can I help you with?
Why doesn't the body of the helicopter rotate in the opposite direction as A helicopter flies off its propeller rotating?
The tail propeller keeps the helicopter straight.
When do two gears rotate in the same direction or in the opposite direction?
Two gears rotate in the same direction when they are both either on the same side of the gear train (parallel arrangement) or they have the same number of teeth. They rotate in the opposite direction when one gear is driving another gear and they have a different number of teeth.
A planet that appears to spin counterclockwise when viewed from its north pole has a?
This is the definition of prograde rotation. In the solar system, a rotating body seen from its North Pole will appear to be spinning counterclockwise. This is different then retrograde rotation in which a body spins in the opposite direction.
Which direction does the moon rotate if it orbits anticlockwise?
That means that if you observe from the north, it would rotate counterclockwise - the direction opposite of the rotation of a clock's hands.
Does Venus rotate in a direction opposite to all other planets?
yes it does
Why do wheels of fast cars appear to rotate in opposite direction?
This phenomenon, known as the wagon-wheel effect, occurs when the frame rate of a camera is synchronized with the rotational speed of the wheel. It creates an optical illusion where the wheel appears to rotate in the opposite direction due to aliasing effects.
Why does planet venus rotate in opposite direction?
because it got hit by an astroid
How do you rotate the screen on an ipod nano?
if you read the manual, you find that the screen can be rotated by rotating two fingers on the screen in the direction you wish the screen to rotate. simple
Which way do twin screw props on a boat rotate when propelling the boat forward?
In opposite direction, but they are designed to propel the boat forward even if they rotate in opposite directions.
Does Lancaster engines rotate in the same direction?
No, Lancaster engines rotate in opposite directions. The left engine rotates clockwise while the right engine rotates counter-clockwise, a configuration known as "contra-rotating." This setup helps to minimize the effects of torque and improve the aircraft's handling.
In what direction does the scanning stage of a KLA-Tencor Aset F5x rotate?
Stage is not rotating. It is moving in XYZ directions.
Do all tornadoes rotate the same way?
No. Most tornadoes in the northern hemisphere rotate counterclockwise while most in the southern hemisphere rotate clockwise. Furthermore, a very small percentage (less than 1%) of tornadoes are anticyclonic, rotating in the opposite direction from what is normal in their hemisphere.
