WHAT IS A STANDING WAVE....................................................?

DEAR SURI,

         A VIBRATION OF A SYSTEM IN WHICH SOME PARTICULAR POINTS REMAIN FIXED WHILE OTHERS BETWEEN THEM VIBRATE WITH THE MAXIMUM AMPLITUDE.

@ suri 
Standing wave , that is also known as stationary wave is a wave in a medium in which each point on the axis of the wave has an associated constant amplitude , and the point within them are oscillating with the range of maximum and minimum amplitude . 
The location at which the amplitude is minimum is called as nodes , and the location or point where the amplitude is maximum is called as antinodes . 
DE BROGLIE , USED THE CONCEPT OF STANDING WAVE TO PROOF THAT PARTICLE IN MOTION HAVE DUAL CHARECTER , THAT IS PARTICLE AND WAVE . 
HOPE IT CLEARS YOUR DOUBT 

ALL THE BEST ..