What Causes the ‘Shine’ of a Wet Pavement?

When it rains, water covers the pavement like a smooth layer. This makes the surface extra shiny because light can reflect off it better than when it’s dry, just like how a mirror reflects light perfectly!

Water fills in all the little bumps on the road, making it flat and smooth. When light hits this new flat surface, most of it bounces back at once, creating that shiny mirror-like look.