Calendar door number 7

The question is:

What does Ms. Santa observe and why?

For today's question you need the following pdf-file:

PiA2015_Experiment_07.pdf

Latest submission time: Monday 07 December, 2015, 23:00 PM

Unfortunately, a solution for this question can no longer be submitted!

Correct answer Answer
A) The word KOHLEN and the word DIOXID are both upside down.

Answer
B) The word KOHLEN DIOXID can be read unchanged.

Answer
C) The word KOHLEN is upside down while the word DIOXID is unchanged, because red light gets refracted more strongly by the wine glass.

Answer
D) The word KOHLEN is unchanged while the word DIOXID is upside down, because green light gets refracted more strongly by the wine glass.