Labels:text | font | screenshot | line | black and white | diagram OCR: From the foregoing problem, we see that under certain conditions it is possible to substitute a simple formula for a complicated one without affecting the results. Great care must be taken, of course, to ensure that the conditions needed for such simplication are in fact satisfied. Another useful result base on two such approximations is developed in Problem 8. But first we consider the basic geometry of photographic scale. Problem 7. In Fig. 4.8, the flight path of an airplane or satellite carrying a camera with its lens at C is shown by the arrow. The camera is at a height H above the ground and has focal length f. P a. IF PQ is the image on the film of line AB on the ground , find the scale of the picture, the ratio Fig. 4.8 PQ/AB , assuming the picture is taken vertically H (PA is perp ...
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