257-MP7 Intro rev 1

257-MP7 Intro rev 1 - MP7 Atomic Spectroscopy PHY 257 In...

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MP7 Atomic Spectroscopy PHY 257 In this lab we will comp lete the follo wing tas ks : - Become familiar with a grating spectrometer - Measure the wavelengths for the Balmer series in Hydrogen - Measure the average wavelength of the Sodium D-line - Measure the separation between the components of the D-line (optional) etermine the cutoff wavelengths for a “low pass” filter - Determine the cutoff wavelengths for a low pass filter (page 1)
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In this lab we will use the grating spectrometer shown in the figure. Light, whose wavelength λ we wish to determine, is collimated (its rays are parallel) by the collimator of the spectrometer. The collimated light is then incident at right angles to a grating and it gets diffracted according to the equation: sin m dm θ λ = Here m = 1,2,3, … is an integer known as the “diffraction order” and d is the separation between two successive lines on the grating. The wavelength λ is given by the equation: n sin m d m λ= (page 2)
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Incident light Sections V-7, and V-8 : Wavelengths of
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257-MP7 Intro rev 1 - MP7 Atomic Spectroscopy PHY 257 In...

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