[Hans L]

re: 1

 

Sin(0x) is 0.  Sin(0x + pi/2) is 0.  Sin(0x + pi) is 0.  Without phase information you still have an image.  It is most likely that all imaging devices you have ever used are "phase blind."  Unless you do holographic imaging there is no phase information recorded. 

 

 

Well, when I learnt mathematics, sin(0x + pi/2) was 1.

And sin(0x + pi/6) was 0.5.

 

So it seems as if phase does carry information.