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Experiment 8: The Grating Spectrometer Data: Spectrum Measurement Color ? 1 ? ? '1 ? 2 ? '2 Red - orange 19 56 Yellow 23

Experiment 8: The Grating Spectrometer

Data: Spectrum Measurement

Color

?1?

?'1

?2

?'2

Red - orange1956
Yellow2355471
Green2252571
Teal2254
Blue2651
Blue-Violet27

49

1. Calculate the wavelength for each of the lines you measured. Recall that for each line you

measured the angle twice. To get the deflection angle, use equation 8.3.

2. Try to match your calculated wavelength values with the values in the table of accepted values. Calculate the percentage error for each wavelength calculation.

image text in transcribedimage text in transcribed
Deflection angle = 2ACCEPTED VALUES In one fringe, you can typically make out four distinct color bands, similar to the spectrum shown in figure 8.2. 45.80 40.08 39.750 44.70 Figure 8.2 A typical diffraction pattern for one fringe from the light emitted by Mercury A Mercury lamp emits light at specific wavelengths. The colors and wavelengths of the strongest visible lines in the Mercury spectrum are: Color Wavelength (nm) Intensity Violet 404.6 moderate 407.8 weak blue-violet 435.8 strong green 546.1 strong yellow 577.0 strong 579.0 strong ADD A

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