Interresting , there was a youtube video by some optical-electro engineer talking about this , youtube removed the user like 1 hour aftrwards .
Couldnt find anything , I tried all the key-words I tried , the video was gone ... It was some conference with some engineer guy , he simply explained what the dam scalar finally were . I always do a search on youtube for "scalar waves" and such .
A lady asked about scalar waves , he simply drew some mirror waveform kinda like Meyers and said that scalar waves happens when 2 waves , w/e waves , of same frequency w/e frequency , cancel out eachother . This creates what he called "interference patterns" ... Again , this is all textbook and nothing special .
But it was nice to finally get a definitive answer .