Today we showed various objects under the infrared camera, and discussed how an object’s emissivity impacts the absorption and emission of thermal radiation. But, an object which absorbs well in the visible spectrum—something that appears black—doesn’t seem to emit well in the visible—after all, it appears black. Therefore, knowing which parts of our experience to use to decide on an object’s emissivity is a bit subtle.

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Today we showed various objects under the infrared camera, and discussed how an object’s emissivity impacts the absorption and emission of thermal radiation. But, an object which absorbs well in the visible spectrum—something that appears black—doesn’t seem to emit well in the visible—after all, it appears black. Therefore, knowing which parts of our experience to use to decide on an object’s emissivity is a bit subtle.

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We began looking at thermal radiation during class today, and there are lots of great demonstrations and resources based around this topic. But, between the youtube video, the infrared camera, the kettle, the nail burning demo, the doc cam, my computer, two projectors, and the clicker, I had many balls to juggle during class today. Therefore, I wasn’t so smooth in all the transitions.

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We began looking at thermal radiation during class today, and there are lots of great demonstrations and resources based around this topic. But, between the youtube video, the infrared camera, the kettle, the nail burning demo, the doc cam, my computer, two projectors, and the clicker, I had many balls to juggle during class today. Therefore, I wasn’t so smooth in all the transitions.

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Helping out a colleague in need, I subbed in a second class today, and so I spent 1.5 h interacting with 200 new faces. But, the students in that class also saw a new face (mine). Therefore, there was some respect and tentativeness on both sides.

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Helping out a colleague in need, I subbed in a second class today, and so I spent 1.5 h interacting with 200 new faces. But, the students in that class also saw a new face (mine). Therefore, there was some respect and tentativeness on both sides.

Continue reading

The Fall semester is long, and there is no Fall reading break at our institution. But, there are long weekends, and we’re currently on the verge of another one, to be used for some rest and recharging. Therefore, I’m feeling a bit tired but also unhurried.

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The Fall semester is long, and there is no Fall reading break at our institution. But, there are long weekends, and we’re currently on the verge of another one, to be used for some rest and recharging. Therefore, I’m feeling a bit tired but also unhurried.

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When in class, I feel high energy, and as a result I do lots of moving around when speaking. But, pacing while talking can be perceived as nervousness. Therefore, I’ve been conscious about trying to plant myself in one spot when making important points.

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When in class, I feel high energy, and as a result I do lots of moving around when speaking. But, pacing while talking can be perceived as nervousness. Therefore, I’ve been conscious about trying to plant myself in one spot when making important points.

Continue reading