Ch7 lec 2

(4/21/20, bes)

Additional Light Lab Info

In our lab discussion i did not introduce you to the "photodiode array" (PDA) <-- not "public display of affection" --> instrument. A PDA is very similar to an electronic version of a "glass prism." A prism separates the wavelengths of light into the individual color components; when a rainbow is observed, the tiny water droplets are acting as a prism. If we were to direct "white" light into the PDA (which contains a prims and more), then you could measure/collect a "spectrum" similar to the "broad," featureless spectrum (red) on the far right figure...note the wavelengths are in nanometers (nm). This figure is complicated by the fact that these authors used a technique to separate the light prior to it entering the PDA, so that is why there are all of the other "narrow" spectra also shown.

Sorry, i know this is a little confusing...hand in there...here is another example...