We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
MOTION PICTURE PHOTOGRAPHY
science of optics is embraced under these four sub-heads and the better we understand these properties of Hght the more inteUigently will we be able to know how to illuminate a scene and what lenses to use, in order to obtain any photographic result that we wish.
We have already found that light is propagated outwardly in straight lines in every direction from a luminous object. When it strikes a smooth reflecting surface, such as a mirror or a pool of still water, it is reflected back from the reflecting surface at the same angle at which it strikes, or in more scientific terms, the angle of reflection is equal to the angle of incidence, as shown in Figure 8. As we have become accustomed to visualizing objects as being in a straight line before us, since light always travels in straight lines, when we look into a mirror we do not see the
Fig. 9 Reflection of light from an irregular surface.
mirror itself but the image which it reflects and the reflected image appears to be behind or beyond the mirror, since our habit of sight perceives the reflected object in that direction. If, however, the rays of light fall upon an object which is not perfectly smooth, each tiny particle which composes its surface presents a different angle to the light rays than its neighbor, so that the light will be reflected at a dififerent angle from each of these particles. This light reflected from the rough surface has thus had its direction broken so that it travels in many different directions. This is shown in exaggerated form in Figure No, 9,
36