PHOTO IN THE NEWS: World's Smallest Periscope Built
source: http://news.nationalgeographic.com/news/2009/02/090207-smallest-periscope-photo.html
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Scientists at Vanderbilt University have built the smallest periscope yet made—about the width of a human hair.
The device, known as a mirrored pyramidal well, uses pyramid-shaped cavities molded into silicon that are then coated with a reflective layer of gold or platinum.
When a tiny object is placed inside the well and viewed through a microscope, the observer can see several sides of the object at the same time.
The device, known as a mirrored pyramidal well, uses pyramid-shaped cavities molded into silicon that are then coated with a reflective layer of gold or platinum.
When a tiny object is placed inside the well and viewed through a microscope, the observer can see several sides of the object at the same time.
