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J. Perelman
"Entertaining physics". Book 2.
Chapter 9. Reflection and refraction of light. Vision


One of the curiosities of the photographic art are images that are photographed are depicted in five different turns. In the figure below, made by such pictures, you can see these five provisions. These pictures have the definite advantage over ordinary that give a more complete understanding of the characteristic features of the original: you know how much we care for photographers on how to make the face shoot the most profitable rotation; here's the first thing you face a few turns, among them more opportunities to catch the most characteristic.

Five-time picture of the same person.

How do I get these pictures? Of course, with the help of mirrors. Photographed sits with his back to the phone and face-to-two vertical flat mirrors With a converging angle in one 5-th part of 360°, i.e. 72°. Such a pair of mirrors should produce four images that have been rotated in different ways in relation to the apparatus. These images plus natural object and photographed by the apparatus, and the mirrors themselves (without a frame) in the picture, of course, not work. In the mirror did not reflect the photographic apparatus with its cover two screens (IV) with a small gap for the lens.

The method of obtaining five photos.
Photographed is placed between the mirrors of the SS.

The number of images depends on the angle between mirrors: the smaller the number the resulting images more. At the angle of 360°/4 = 90° we would get four images at the angle of 360°/6 = 60° - six images in 360°/8 = 45° - eight, and so on, However, when a large number of reflections of the image dull and weak; therefore usually limited to five shots.

Entertaining physics J. Perelman


System Orphus


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