Is there any difference between de-Broglie wavelength and the wavelength of normal waves?
Is de-Broglie wavelength different from wavelength of waves such as
  electromagnetic waves?


I would atually say no, there is no difference, since the wavelength is purely mathematical characteristic of a wave, the distance over which the wave's shape repeats. There is, however, an important difference between de-Broglie waves on the one side and usual physical waves (mechanical &amp; electromagnetic) on the other:


The later consist of periodic oscillations of a physical quantity, such as, for instance, the pressure for sound waves or electrical and magnetic fields for electromagnetic waves.
The former consist of periodic oscillations of a mathematical quantity, the probability of finding a particle at some location.