It'll be a while before I get this light stuff down = Oh well.

TMG,
Must experiment with this. 1.333 not 133.333 ?
According to the manual IR only works in B5 at values
over 100. bikermouse scratches head(???)

Something I hadn't thought of in terms of global warming -

salt water apparently has a different IR than fresh water - the IR can, at more obtuse angles determine if light bounces back or is absorbed by the object at the INTERFACE between the two objects - the IR of fresh water is enough differnt from that of salt water that it allows rays (and heat energy) to be absorbed by the water rather than bounce off - the inference is that this contributing factor to globasl warming (real world example.)

so IR could effect the reflective quality of a material -
perhaps the reflected color as well.

Madmax,

I do thank you for the time and effort that you put into this thread as It has been thirty years since I was in school and the review is, to say the least, timely.

Although your example was very good, the doubling effect you mentioned earlier wasn't what I was talking about regarding my observation of reflection off of an empty glass tumbler.

My concern was about a reflection being repeated on the OUTSIDE surface of an empty glass vertically. From what I could tell this is solely an external reflective quality, not an internal or refractive one. It may be the poor quality of the glass or some aspect of the reflective quality of aluminum, but odd as it sounds - two external reflections sepatate and "tiled" vertically.

I guess as it stands it's still just a wierd observation
poorly described my me.

• TJ