Re: Help Needed in Answering Question

r----- Look, a Post-It Note� from "bi;na;ry" <bin...@REMOVETHIS.mfg.sgi.com>! -----
|> > 14.     Two identical planes are flying over the dessert. One at 400 feet
| and
|> > none at 500 feet. Which one has the larger shadow?
|> >
|> > Please enlighten me with regard these questions. THANK YOU
|> 
|> If the sun is overhead, their shadows are for all intents and purposes
|> identical in size, because the light rays from sun are nearly parallel.
|> If you want to be picky, the higher plane will be immeasurably larger.
`---
I know what you mean, but 'immeasurably larger' gives the feeling of huge 
bigness and not an imperceptible difference.  But life goes on---
r---
|Actually the shadow of the higher plane will be smaller. See, the light
|source (the sun) is bigger than the object which means that the light
|will kinda bend around the object. (Light bends anyways but we are not
|going to go in to that topic.)
|Example:
|
|                
|\ 
| |
| |                            /
| |                            |
| |                            |
| |                            |  
| |              __            |  
| |  Plane-->   _\ \_/|        |
| |            <__\ \_/        | <- Earth
| |                \_\         |
| |                            |
| |                            |
| |                            |
| |                            \
| |
| |
| |
| |  <-Sun
|/
|
|Now if you draw lines of where the light can and cannot go you will see
|that as the plane moves closer to the sun the shadow will shrink to the
|and past the point of dissapearing.  Obviously the picture is not to
|scale, so with the picture that I have made, there is no shadow of the
|plane in question.  
|
|Sorry I couldn't do better. That's probably why I am a technician and
|not an artist.
|
|binary
`-----
I think it's a very good picture (the plane).

M.

-- 
mat...@starplace.commander | http://members.delphi.com/matanywira/
.Be sure to remove this^^^^^^of course, but my email is often down..

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