Of both ranges were also taken the data can be seen

of both ranges were also taken. The data can be seen in Table 2 below, and screenshots of the
hydrogen range can be viewed in Figure 2 in Appendix A. The helium range can be viewed in
Figure 3 in Appendix A. The screenshots of the VIS-range have been rotated and enlarged to
make it easier to view.
Table 2: Amadeus measurements for Hydrogen and Helium
Hydrogen Helium
Amadeus Amadeus
434 389.9
488 448
657.5 472.2
494
502.2
589.8
669.9
707.9
729.9
779.7
After comparing the data collected from the hand-held spectrometers to the collected
form the Amadeus, it can be determined that the wavelengths were in agreement within error.
Uncertainty was taken the same way as Investigation 1.
Investigation 3
In this investigation, light spectra from different blackbody-like sources were collected
and studied with the Amadeus. The same program and set up as Investigation 2 were used. The
integration time was adjusted so that the peaks of the spectral curve are large enough to just fit
the window. The spectral curve was screenshotted for each object tested. A light bulb, a cell
phone, and a computer screen were all tested. RGB stands for red, green and blue. Based on the
data collected, all three data sets had the highest wavelength intensities at the colors red, green
and blue. This means that these colors radiate the brightest. The uncertainty for this was
calculated to be 1.1 nm, and was calculated based on the error calculations discussed in
Investigation 1. The light spectra for a lightbulb can be seen in Figure 4. Figure 5 shows the light
spectra for a computer screen. Figure 6 displays the light spectra that is given by a cell phone

8
screen. These figures have been rotated and enlarged for onlookers convenience. Figures 4 5 and
6 are located in Appendix A.
Figure 7 in Appendix A is analyzed carefully. The UV-VIS range of a lightbulb was
gathered using a different type of spectroscope. The spectrum from the lightbulb is continuous.
Based on Figure 7, there is very little UV being emitted. This is seen because UV has
wavelengths from 10-400 nm, and looking below 400nm, there are little to no wavelengths being
produced. The spectral wavelength corresponding to the maximum of the spectrum curve is
around 650 nm. The temperature of the spiral inside of the lightbulb can be found by using
Wein ’ s formula and using the spectral wavelength corresponding to the maximum of the
spectrum. The temperature was found to be 4458 Kelvin.
𝑇 =
2.8977 ∗ 10
−3
650 ∗ 10 −9
= 4458𝐾
Figure 8 is given in Appendix A. Figure 8 shows the spectrum of the sun. Based on the
UV-VIS range given, it can be determined that the sun is continuous. Based on the graph there is
not any substantial amount of UV radiation being emitted. This makes sense because Earth ’ s
atmosphere absorbs most of the UV radiation that is given off by the sun.
Table 3 below shows a table listing lines, dark lines, in the Sun ’ s spectrum where light is
absorbed before it reaches our eyes. This table is used and compared to Figure 8. The lines listed
in the table can be seen in Figure 8. There are many small lines that are undocumented. An
example would be the dips between 400-450 nm.