traveling of electromagnetic waves

Question

anonymous · Answer

please see the attachment

egenriether · Answer

I see what you're saying but the two waves are always in phase as shown.  The reason they don't go to zero and stay there is because they are changing together.  A changing E field makes a B field that is changing (not static)  Therefore they change the most at the same time.  If one peak was at a maximum (or minimum) while the other crossed zero (biggest point of change) then the changing field would be making a non-changing field, and that would make the wave not work.  I had the same thought once and my E&M professor set me straight.  He probably said it better than I did though...

anonymous · Answer

great... thanks friend
egenriether