Question

why do the strings of guitar appear hazy?

Answer 1

 

MAP





ELECTRIC GUITAR STRING GROUND

In an electric guitar or bass, it's usually necessary to 'ground' the strings. 

I say that all the strings should have a path to ground — a wire that connects them to a ground point inside the instrument. Usually that ground point will be the back of a pot or the sleeve of the output jack. 

Answer 2

when they vibrate their resonance matches with the air's resonance so they get hazy and apparently visible