Prepare a chart containing 3 horizontal bars. Label the 1st bar "Mid-IR" and the ends of the bar 400 cm-1 and 4000 cm-1. At appropriate lengths along this bar place a line for "1000 cm-1" and another line for "2000 cm-1". Below each of these 4 wavenumbers place the equivalent wavelength in micrometers. Label the 2nd bar "Visible" and the ends of the bar "400 nm" and "780 nm". Put a line on this bar for the approximate center of the region of red, orange, yellow, green, blue, indigo, and violet light. Below each of these 9 wavelengths place the equivalent wavenumber in cm-1. Label the 3rd bar "Near UV" and the ends of the bar "180 nm" and "400 nm". Place a line at the appropriate length for "300 nm" and for "250 nm". Below each of these 4 wavelengths place the equivalent wavenumber in cm-1.