Leaky rainbow

 

It is colorful, but it is not a rainbow

Passers-by were taken by surprise by the petroleum product drip "rainbow" that appeared in the parking lot beneath their feet.

 

Spill flowing

Spilling and dispersing

A wet parking lot reveals the petroleum product drips and leaks on the street beneath our feet.  As light is reflected and refracted by the layers of differing thicknesses, colorful "rainbows" are produced by the thin film interference.  The slight slope of the lot shows the flow and spread of the spilled product.

 

Street rainbow

Rainbow drip

A brief rain shower revealed this petroleum product drip that had previously not been seen in the street beneath our feet.  The colorful "rainbow" effect is caused by constructive and destructive interference.  

Drippy penmanship

Lance?  Vance?  Birdfoot?

Using too much paint on  a vertical surface can result in unsightly drips.  A hurried stroke leads to the reader wondering what was written.  Maybe that is what this graphito meant to happen when they tagged the side of this trademan's van?

Rain and Puddle

Rain puddle

The street beneath our feet during a Saturday afternoon rain storm.

Drip trail

Constructive and destructive interference

Rainbow road

Light reflected by petroleum products drops on a rain soaked street creates colorful patterns.

A moving vehicle left this drip trail on the street beneath our feet.