What term is commonly used to refer to the bending of light
it can either be refraction or diffraction.
refraction - bending of a wave or light as it passes from one medium into another, or as it passes through a non-uniform medium.
diffraction - bending of a wave or light in a homogeneous medium around obstacles or through a narrow opening.
As you can see the difference between the two is that diffraction is related to obstacles or narrow openings.
hope this helps :)