The Grafing Spectrometer

# The Grafing Spectrometer - • Discrepancies were in place...

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The Grating Spectrometer Fields Lab: DESCRIPTION The goal of this lab exercise is to measure determine the wavelength of bright lines from the emission spectrum of mercury. THEORY mλ = d sin θ m N = 600mm d = 1mm/ N = [(1mm) / (600mm)] × 10 6 = 1666.66 nm where λ wavelength of the light m = 0, = order of interference d = slit separation θ m - angle between the incident beam and the direction of the m-th maximum Calculations Page 1

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m 1 1 1 2 2 2 color Violet Green Yellow Violet Green Yellow Θ R (˚) 15 19 20.5 16 20.5 22 Θ L (˚) 14 19 21 16 20 22 Θ av 14.5 19 20.75 16 20.25 22 Color ------- Violet Green Yellow Θ exp Deg. 15.25 19.625 21.375 λ exp nm 438 559 605 λ th nm 430 550 562 D % 1.8 1.6 7.6 Discrepancies :
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Unformatted text preview: • Discrepancies were in place due to human error • The grating was not exactly perpendicular to the incoming light, causing error in our angles • There is a minimum division error of 0.1 degrees • We are assuming the waves can be seen as straight planes, but they are actually seen as curved Page 2 CONCLUSION I found interesting this experiment and after all the discrepancies we had the expected results. The low discrepancy show that we calculate the wavelength of bright lines from the emission spectrum of mercury. Page 3...
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## This note was uploaded on 02/06/2012 for the course PHY 101 taught by Professor Urteaga during the Spring '11 term at Broward College.

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The Grafing Spectrometer - • Discrepancies were in place...

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