         solution = plancksLaw TEMPERATURE, WAVELENGTH
         slideHandle.attr transform: "translate(0, #{ sliderScale TEMPERATURE })"
         handleLabel.text TEMPERATURE
-        handleSolution.text if solution[1] then expwn solution[1] else ""
+        handleSolution.text if solution[1] then "I: #{expwn solution[1]}" else ""
         plots.selectAll '.series.interactive'
           .data [series]
           .call plotSeries
           .classed interactive: true
           .select "path"
             .style color: "black"
+
+        wavelengthLabel.attr transform: "translate(#{ xScale WAVELENGTH }, 20)"
+          .select "text"
+          .text "λ: #{expwn WAVELENGTH}"
 
         solutions.selectAll '.solution.interactive'
           .data [solution.solution]

                .classed unit: true
                .text " [µ]"


      plots = plotSvg.select ".plots"
      solutions = plots.select ".solutions"

      el_yAxis = plotSvg.select ".axis.y"
      yLabel = plotSvg.select ".label.y text"
      xLabel = plotSvg.select ".label.x text"
      wavelengthLabel = plotSvg.select ".wavelength.interactive"


      # slider stuff
      slide = d3.behavior.drag()
