Question
Asked Oct 1, 2019
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7.4. Four measurements are made of the wavelength of light emitted by
certain atom. The results, in nanometers, are:
525 20, 570 t 40.
503 ± 10, 491 + 8,
Find the weighted average and its uncertainty. Is the last measurement worth in-
cluding?
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7.4. Four measurements are made of the wavelength of light emitted by certain atom. The results, in nanometers, are: 525 20, 570 t 40. 503 ± 10, 491 + 8, Find the weighted average and its uncertainty. Is the last measurement worth in- cluding?

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Step 1

The weighted average of measurements is,

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(503 10)nm+(491 ±8)nm + (525#20) nm + (570 40)nm av 4 (503+491+525+570) ± (10 +8 + 20+ 40) nm (522.25 19.5)nm

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Step 2

The uncertainty in weight average is 19.5. Since the last reading has highest unc...

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