Experiment of December 13, 2020:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

Experiment:

Question:

What does Ms. Santa see?

A) The pin is not visible at all.

B) The pin appears in different colours of the rainbow depending on the viewing angle .

C) The pin appears much longer and has a colour fringing.

D) The pin appears much longer and, depending on the viewing angle, in different colours of the rainbow.

Advice of the day:

Today's question is about the coloured head of the needle that is under the cardboard disc.