The phenomenon of bending of light around the corners of small obstacles and its consequent spreading into the regions of geometrical shadow is called diffraction.
Some real life examples where diffraction actually happens are:
1)The closely spaced tracks on a CD or DVD act as a diffraction grating (an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions) to form the familiar rainbow pattern seen when looking at a disc.
2) The hologram on a credit card is an example in which we engineer a grating so that we can get a desired diffraction pattern.
3) Diffraction in the atmosphere by small particles can cause a bright ring to be visible around a bright light source like the sun or the moon.
Image source: http://apollo.lsc.vsc.edu/classes/met130/notes/chapter19/corona.html
Source used to answer this question : https://en.wikipedia.org/wiki/Diffraction