The ruler is limited to millimeters so we can't be as precise. The tape could have been displaces or hanging of the lense increasing the uncertainty. Also, there was a lot of track movement to get a clear image of the diffraction which changed the h value, so it’s hard to tell which would track distance is optimal for calculating the h value. It’s also hard to measure the value with the light in the way. I think since we’re limited in how far we can move the base and hair, I would say it's hard to get an accurate measurement. I said we’re in the range of it, not super accurate but also not terribly inaccurate, I would say we could be off by + or - 0.2 cm. The total uncertainty for the position of the strand would be around 0.2 cm which is a reasonable amount. The measurements may be statistically different because of the measurement errors that are present. The data that we collected may be a little off so comparing that to measurements produced in the t-test won’t result in the same data.
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