Santa's Secrets RevealedYears ago, NORAD started
tracking Santa Claus every Christmas Eve. After all, there's a fast-moving object travelling on an erratic path around the world, and if you're NORAD you don't want to mistakenly shoot down a reindeer.
Now, I know if you're my nephews' age (7 and 9), you've got a lot of questions about this yearly journey. Questions that need answers. Questions like:
Why is Rudolph's nose red? Rudolph is leading the team of reindeer, and they are travelling at incredible speeds -
hypersonic speeds - through the atmosphere. As a result, Rudolph's nose is piercing the airflow and heating up due to air friction, becoming red-hot. You might even say it glows. Note that this does not require some mythical "ion field" or "11 dimension" manifold, as is stated in
the Physics of Santa.
Hypersonic speeds huh - so how come there aren't any sonic booms? Don't be surprised if you don't hear multiple sonic booms as Santa passes close by your house. The
fractal configuration of reindeer antlers causes
interference patterns in the hypersonic shock wave, breaking it up before it turns into a sonic boom. Indeed, the airflow around the reindeer and sleigh resembles that of a golf ball, whose dimples create a low-drag fluid
boundary layer.
How does Santa know where my house is? and how does he know if I've been naughty or nice? The secret surveillance program was revealed in the
Bright and Early blog. The details of this program are far beyond the scope of this simple blog post, so be sure to read the shocking details there. Plus, Santa uses
Google Earth.
How does Santa get down and back up the chimney so fast? And what if I don't even have a chimney? The legend of Santa climbing down the chimney is based on a misunderstanding of quantum mechanics by
Clement Clarke Moore in the poem "
A Visit From St. Nicholas" (Twas the Night Before Christmas). In the poem, Moore stated that:
And then, in a twinkling, I heard on the roof
The prancing and pawing of each little hoof.
As I drew in my hand, and was turning around,
Down the chimney St. Nicholas came with a bound.
What Moore didn't know about quantum mechanics is that at that same instant, the reindeer were
on every roof in the town of Troy, New York, simultaneously, and that Santa Claus used a
quantum tunnelling effect to transport himself down from the roof into Moore's living room - and indeed, every living room in Troy
at the same time. It is only Moore's observation of the event that caused the collapse of the wave function that made it appear (to Moore) that Santa was in Moore's living room and nobody else's. Perhaps Santa tried to explain the quantum tunelling process to Moore, who became confused and explained it as a bound down the chimney (which is sort of like a quantum tunnel).
How can reindeer fly without wings? When the reindeer are pulling Santa's sleigh, they are moving very fast. The
streamline distance under a reindeer's belly is much less than the streamline distance over its antlers, back, and tail. This means that the air moving over the reindeer's back has a much higher relative velocity compared to the air moving under its belly, so according to
Bernoulli's principle the air pressure above the reindeer is lower than the air pressure below the reindeer, thus giving the reindeer
lift. If you're wondering how the reindeer can go so fast... well, they eat a lot of candy canes, which contain lots of sugar.
How does Santa manage to pack all those toys into his sleigh? Obviously, there are a lot of kids in the world, so that's a lot of toys to carry. However, not all kids are good, and the bad ones get coal (which takes up much less volume). Also, some kids receive gifts that are not material in nature, such as the love of friends and family. Even so, that still leaves a lot of gifts to carry, much more than would fit into the volume of a single sleigh. The solution is that Santa actually has
three sleighs, and two different sets of reindeer. The first set of reindeer (Alpha Squad) is the group that you're most likely familiar with (Rudolph, Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner and Blitzen), and they take several shifts pulling the first sleigh. The second sleigh is pulled by the second set of reindeer (Bravo Squad), which is made up mostly of the junior varsity reindeer, and led by Olive (the other reindeer). The third sleigh is not pulled by reindeer at all, but by six white kangaroos (also known as
The Boomers, not to be confused with the
fictional character
Boomer on
Battlestar Galactica), during Santa's trip to Australia. So, Santa actually makes several trips from the North Pole to points around the earth and back. While he's out making deliveries, his other sleighs are being loaded for the next shift. This also gives the reindeer (and the Boomers) a chance to rest between trips.
I hope that this has answered some of the questions that you may have had about Santa Claus. Of course, that isn't why we celebrate Christmas.
This is:

Merry Christmas.
Technorati Tags: Santa,
Physics,
Christmas