I apologize in advance for the many images on this page, which will no doubt slow the download for many of you. These are photos which Cosmic Dave has asked for and are being presented here for him and for further discussion.
1. The apparatus used to simulate the 16mm DAC frame in which the astronauts appear to cast shadows of different lengths, seen edge-on. The "astronauts" are wooden dowels. The "lunar surface" is pasteboard bent to simulated to an exaggerated extent the contour of the lunar surface. The paint can props the apparatus up to simulate a low sun angle.
2. Roughly the same angle as the DAC frame taken from the LM cockpit. Note the up-sun dowel casts the longer shadow.
3. View from "overhead" showing that the shadow lengths is not an illusion due to perspective -- the shadow is indeed longer.
4. Simulation of David Percy's artificial light hypothesis using a 75-watt PAR 32 lamp. The "astronaut" are two identical Black and Decker Versa-Pak batteries. Note how the astronaut nearest the light casts the shorter shadow.
5. The same, from overhead.
6. The two astronauts are a similar distance from the light, but displaced transverse to the lighting axis. Note the extreme divergence of the shadows due to non-parallel light. David Percy claims the second proof frame from the DAC was taken using this this lighting method.
7. The same, from overhead.
8. The optical axis correponds here to the lighting axis (near phase). Note that the shadows diverge. This is expected under studio lighting conditions.
9. The same, from a slightly different angle. The shadows slightly diverge, and in any case fall on the same side of each astronaut.
10. The same objects photographed in sunlight. Note how the shadows converge. This is expected in sunlight.
11. Similar to (6), only using sunlight. Note that this more closely resembles the second 16mm DAC proof frame.
Okay, Dave, you've been shown the theory at length. You've been shown examples of the theory. You've been shown counterexamples to prove that David Percy's hypothesis is incorrect.
Will you concede that David Percy is wrong on the issue of shadow lengths as captured by the 16mm DAC from the LM window? If not, please provide evidence and not merely conjectural argumentation.
<font size=-1>[ This Message was edited by: JayUtah on 2002-06-02 17:38 ]</font>