Final answer:
The thickness of the thin film in kilometers is 0.000006 km.
Step-by-step explanation:
The thickness of a thin film of semiconducting material is given as 6.0 μm. To convert this to kilometers,
we need to use the conversion factor that 1 meter is equal to 1000 millimeters, and 1 millimeter is equal to 1000 micrometers.
Therefore, 6.0 μm is equal to 0.006 mm and 0.006 mm is equal to 0.000006 km.