Puzzle 4 all !!!!!!

[apoonia]

Write the words CARBON DIOXIDE on a piece of paper, CARBON in red and DIOXIDE in blue. Put the paper close behind the stem of a wine glass, and look at the words through the stem. The red letters turn upside down, but the blue ones don't.

So is the glass affecting the red light more than the blue?

[srajdeep]

Try writing both of them in small letters and not in capitals and both carbon and dioxide will be inverted..

[apoonia]

good work but why not when written in capitals its simple physics try .........harder

[mbamal]

DIXODE has an an horizontal axis of symmetry passing through its mid point...

[apoonia]

that the answer i was looking for great work......