Experiment of December 10, 2018:

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

Solution video:

Experiment:

Question:

What does Mr. Santa see?

A) The stain is light in front of the candle and dark behind it

B) The spot is light in front of the candle and light behind it

C) The spot is dark in front of the candle and light behind the candle

D) The stain is dark in front of the candle and dark behind the candle