Hi,
Not sure if this is a particle physics, Cosmology or physical science question - maybe all !
If light travels as a wave, why do the waves not interact with each other (like water waves do) on the way to our eyes. We should surely end up seeing just a mess of light.
The question also relates to light sources in the universe where the light has been travelling with/alongside and interacting with other light sources for billions of years. So, how can we see individial (e.g. stars, galaxy's etc) light sources ?
Stupid question - obvious answer ?
George