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Time interval with three phones
(09-21-2021, 10:54 AM)Jens Noritzsch Wrote: On the technical side, the sensitivity and rate of light sensors heavily vary between smartphones. As far as I know, we have not seen rates beyond 10 Hz, more likely lower.

For a start, I would check how precisely the time between to flashs could be measured and if you observe differences when switching the two stopwatches. I wonder if the smartphone torch would work better as a signal?

Thanks for feedback Jens!

Turned out about half of the class have iPhones where the light sensor seems to be disabled (or blocked so that phyphox cannot talk to it).

The mounted light source in the gif is strong enough, see attached jpg of signals from flash and passing light source. A phone torch would do fine too, but after measuring the horizontal velocity, the toy car is supposed to continue over the edge of a table (free fall). For this experiment, mounting a phone on the toy car would probably work, but maybe just once...

Best regards.


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Messages In This Thread
RE: Time interval with three phones - by Erik Josefsson - 09-22-2021, 05:47 AM
RE: Time interval with three phones - by solid - 09-22-2021, 08:54 AM

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