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2 September, 21:27

When Vernier readings (degree) were plotted on y-axis, and wavelengths of line-spectra (nm) for Hg-lamp were plotted on x-axis, the best-fit-line equation obtained from Excel was y = 0.204x + 131.5 Predict where (on the Vernier reading) you may find the faint purple line in Hg-lamp, which was very challenging to find in this lab.

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  1. 3 September, 00:08
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    213.9°

    Explanation:

    The faint purple line in Hg-lamp falls around 404 nm.

    Corresponding Vernier reading based on the best fit line equation is given by substituting for 404 nm for x in the above equation

    y = 0.204 (404) + 131.5

    = 213.9 degrees
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