Natural Science Forum / Physics / Particle Physics / August 2007

With the dual slit experiment the projection
shows an interference pattern that can only
occur if light is an electromagnetic wave.
If a lens if put behind the dualslit diafragma
and focussed the projection is the one of
the two slits and the interference pattern is gone
which can only occur if light is a stream of
particles. What will happen if instead of a lens
smoke is blown between the diafragma and
the projection. Will the light 'behave' as a wave
or as particles?