Wave Types Lessons - Show Me The Physics Website

Video Instruction

showmethephysics.com

From the author

'just happened upon this trick when testing what it was like filming from inside my guitar.
*Note this effect is due to the rolling shutter, which is non-representative of how strings actually vibrate.'

Tips:
• You must have the strings brightly backlit to get the camera to capture at such a high frame rate (pure conjecture). You can see how the effect fades when the buildings come into view.
• Use a pencil
*This was used with the front facing camera, try the back camera, it may capture better! (tried it, it didn't look as good for me)

There is a heated discussion with *real science* over at reddit.

Reditt