Archive for December 25th, 2008

Merry Christmas!

It’s just 7:30. In stark contrast to just a few years ago, nobody else is up yet. There was a time when my nieces would be staring at the clock, impatiently waiting for the agreed-upon time when they were allowed to wake everyone else up. No more. They’re teenagers.

And here is a physics-related safety message for the holidays:

Hallmark Recalls Jumbo Snow Globes Due to Fire Hazard

Hazard: When exposed to sunlight, the snow globes can act as a magnifying glass and ignite nearby combustible materials, posing a fire hazard.

Incidents/Injuries: Hallmark has received two reports of the snow globes igniting nearby materials. No injuries have been reported.

Well, duh. Convex surfaces and a larger index of refraction.