## Wednesday, March 6, 2013

### The Bullfighter

Son: The absorptivity $\alpha_\lambda$ is the ratio of the energy absorbed by the wall to the energy incident on the wall, for a particular wavelength. This will be proportional to $\alpha_\lambda E_{b \lambda}(\lambda,T)$ where $E_{b \lambda}(\lambda,T)$ is the intensity of black body radiation at wavelength $\lambda$ and temperature $T$.

Actually he has also made another unrelated bold pronouncement. That being that whatever color a truck is indicates what cargo is inside it. Hence whenever we see the UPS truck he yells "they're delivering chocolate!" Importantly we see it parked up outside people's houses - meaning my son thinks it's perfectly reasonable for chocolate to be delivered in bulk right to your door. There is a yellow truck that we tend to see parked outside the local gas station that he claims is delivering much-needed bananas to the community. Mind you he claimed the white trucks we see are responsible for delivering snow to the surrounding areas - suggesting his understanding of weather patterns is woefully inadequate.

On another track entirely - I've also suffered another one of those moments were I thought I was being rational but it makes no sense. That being I watched the first 20 minutes or so of Harry Potter: The Chamber Of Secrets with my daughter. During which time I marveled at the acting of Julie Walters, Robbie Coltrane, Alan Rickman and Mark Williams. Whilst thinking that they were wonderful choices for the characters they were playing I suddenly had the strong pang of, "Yeah  - I think I want to go home...." Which seemed rational and like I'd been suppressing a truth for fear of admitting it. Then I realized I'd got that strong urge by watching a children's movie about witches.

Right - we're off to wait for the bus. So until I tidy up the thing I'd actually written for today you can watch this video of my daughter pretending to be a bull.