<em><u>Refraction is a property of a wave that refers to the bending of a wave as it moves from one medium to another.</u></em>
<em><u>Diffraction on the other hand is a property of a wave such that an object causes a wave to change direction and bend towards it.</u></em>
<u><em>Diffraction and refraction differ in that, refraction occurs when waves pass through an object while diffraction occurs when waves pass around an object.</em></u>
<u><em>The similarity between refraction and diffraction is that they both involve interactions of waves and causes waves to bend thus changing their direction.</em></u>
and the height of the building doesn't matter at all.
joules