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Changes to Step #19

Edit by Andrew Optimus Goldheart

Edit approved by Andrew Optimus Goldheart

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[* black] Poke poke, flick flick, ''tweeeeeze!''
-[* black] With all of the easily-removed components free, we get to work peeling up the remaining, slightly-adhered parts filling the [http://apod.nasa.gov/apod/ap050125.html|Galaxy|new_window=true] S4's display assembly.
-[* black] First out is a multi-purpose component that connects the earpiece speaker, IR blaster, and the sensor array we suspect is responsible for Samsung's new [http://www.samsung.com/global/microsite/galaxys4/lifetask.html#page=airview|Air View/Air Gesture|new_window=true] feature.
+[* black] With all of the easily-removed components out of the way, we get to work peeling up the remaining, slightly-adhered parts filling the [http://apod.nasa.gov/apod/ap050125.html|Galaxy|new_window=true] S4's display assembly.
+[* black] First out is a multi-purpose component that connects the earpiece speaker, IR blaster, and a sensor array hosting the ambient light sensor and a second IR sensor.
+ [* icon_note] The placement of the two IR sensors on either side of the earpiece speaker explains how Samsung's new [http://www.samsung.com/global/microsite/galaxys4/lifetask.html#page=airview|Air View/Air Gesture|new_window=true] feature operates. By comparing IR light reflected from your hand into each of the sensors, the phone can track sideways motion as you gesture without touching the screen.