The light will<span> reflect off the </span>mirror<span> in a more orderly way than it reflects off </span>your<span> clothes. We call that specular </span>reflection<span>—it's the opposite to diffuse </span>reflection<span>. ... The silver atoms behind the glass absorb the photons of incoming light energy and become excited. (This answer is from google to try and put it in your own words)</span>