9. In free space, an electromagnetic wave of \( 3 GHz \) frequency strikes over the edge of an object of size \( \frac{\lambda}{100} \), where \( \lambda \) is the wavelength of the 100 wave in free space. The phenomenon, which happens there will be:
(1) Reflection
(2) Refraction
(3) Diffraction
(4) Scattering
