This is an excellent experiment, I chuckled at this final bit, "So, I was wrong in my 1994 exam. Now, you can shout through a vacuum." No doubt hundreds of spec

This is an excellent experiment, I chuckled at this final bit, "So, I was wrong in my 1994 exam. Now, you can shout through a vacuum." No doubt hundreds of special effects artists who were ridiculed because they put a sound track on a massive ship's engines when flying by in space will now go, "See?! See?! It isn't silent." :-) The results suggest another interesting experiment with dissimilar heat conductors separated by vacuum. Perhaps a heat pump on a small scale could be built.