photoelectric effect:

The process by which certain substances give off electrons when exposed to light. A photoelectric cell (which uses the photoelectric effect) varies the flow of current with the amount of light that it receives. Photoelectric cells are used to detect light, as in electric eyes; to measure light, as in…

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Coding 101Monday March 4, 2019

Coding 101

I had a good time rewriting my latest book, HOW TO TALK TO YOUR COMPUTER (now part of HarperCollins’ Let’s Read and Find Out series). I have always been interested in the intersection of kids, education and computers, and I wrote the…

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