Originally posted by kirksey957On a similar note, why does TV show things that are "really fast" in slow motion? In my world, fast things have a consistant tendancy to be fast, not to wallow through a viscous etherial mire.
everytime I see a car commercial on tv, when the car is rolling forward, the wheels are rolling backwards. I never see this happening in "my world". Why does it happen on TV?
Just to clarify the 'I've seen it in real life statement made earlier'
Yes in fact you have, the reason for this is that there are spokes on the outside of the hubcap and also the wheels themselves underneath have varigated petterns of solid and cut away. These two reference points, when at the right speed can have the same effect as the shutter speed changes on a camers. Your brain translates the different shaped/shaded ares as reference points, at the right speed, these refference points appear to flow the wrong way, if the speed is increased or decreased it will disappear. The same can be seen on technics 1210 turntables, which have a series of different sized dots on the outer rim, as you increase the speed of turn, the dots first come into alignment, then as speed increases more some will flow one way whilst others appear to flow the other way.
Originally posted by ToeThe classic is in war movies. How many times have you seen someone launch a LAW rocket and you see it sssssssssssssss slowly fly toward the target as if it is on a string (prolly is) and then WHAM!
On a similar note, why does TV show things that are "really fast" in slow motion? In my world, fast things have a consistant tendancy to be fast, not to wallow through a viscous etherial mire.
Last time I saw a firing of the new LAW is was more like Boom BOOM! and it's over.
Originally posted by PhlabibitYes that is true. It's because light is emitted in waves which have a frequency associated with the kind and brightness of the light. I work in the aviation business and a rotating propeller on an airplane under a flourescent light (or probably any other light) can be speeded up or slowed down to match that frequency. It will make the propeller appear to be still although you can still hear the engine running. That being said, you can also adjust the speed of the propeller to appear to be rotating very slow or even backward.
I could have sworn I've seen it also with the naked eye?
ES
You do the same thing with a timing light on a car.