Black & White Aerial Photo

http://www.nouvellesimages.com/Aerial-view-of-the-Arc-de-Triomphe_Anonymous_art~AN018_id~cartespostales_mode~zoom

 This is a black and white aerial photograph of the Arc de Triomphe in Paris, France.  This type of photo is an example of remote sensing, meaning that it was taken from a plane which detected and measured the amount of radiation of different wavelengths that reflected back from the buildings and objects.  The black and white emulsion used to take this photograph is sensitive to the same wavelengths that the human eye experiences.