A linear photodiode array mounted in a camera body provides an excellent means of acquiring position‐time information for gliders moving on an airtrack. Based on the output of a 512 photodiode array, a computer calculates positions of two gliders simultaneously with a resolution of 10 μm and accuracy of 400 μm along the full length of a 2 m airtrack. Motions lasting up to 5 min can be acquired at rates of 50 positions per second. The resulting data can be interpreted with the aid of spreadsheets and graphing programs. Setup, calibration, and operation of the apparatus are simple enough that students can design and perform their own mechanics experiments.
This content is only available via PDF.
© 1994 American Association of Physics Teachers.
1994
American Association of Physics Teachers
AAPT members receive access to the American Journal of Physics and The Physics Teacher as a member benefit. To learn more about this member benefit and becoming an AAPT member, visit the Joining AAPT page.
