13 Sep '04 23:52>
Why does your hand look funny when you move it fast in front of the tv or computer screen ?
Originally posted by pidermanYou are right! There is a difference, I first didn't notice.
I think it is definitely the stroboscopic effect. If you move your hand fast in just the air, it will blur. But in front of a screen you will see distinct pictures due to the flasing of the screen.
Originally posted by sfenYes, sometimes we see six fingers instead of five when we move our hand in front of tv screen with fingers spread apart. This happens due to the combined effect of the following two phenomena.
You are right! There is a difference, I first didn't notice.
But wasn't my explanation right?
In front of a screen, you are right about the stroboscopic effect
Originally posted by pidermanWhat the hell is this STROBOSCOPIC EFFECT ?
I think it is definitely the stroboscopic effect. If you move your hand fast in just the air, it will blur. But in front of a screen you will see distinct pictures due to the flasing of the screen.
Originally posted by observantUIt's to do with how our eyes work. When light hits the eyes, the receptors remain stimulated for a few milliseconds after the source of light is removed - the greater the exposure, the longer the after-image. Dazzling is an extreme case of this.
What the hell is this STROBOSCOPIC EFFECT ?
I cant make the head or tail of it.
Originally posted by AcolyteYes - Your eyes also need a bit of blur to make proper sense of movement. That is why stop frame animation looks jerky - even though the update rate is the same as normal tv there is no blur, so the movement looks strange. Its interesting that this means we must see moving things blurred in real life, because they don't look jerky.
It's to do with how our eyes work. When light hits the eyes, the receptors remain stimulated for a few milliseconds after the source of light is removed - the greater the exposure, the longer the after-image. Dazzling is an extreme case of this.
The stroboscopic effect is when you have an intermittent, periodic source of bright light. The illuminated ...[text shortened]... f its rotation. Move it slightly out of sync and you can see how it works, only in slow motion.