You are given kerosene, turpentine, and water. In which of these does the light travel fastest? Use the information given in the table.

Material medium	Refractive index	Material medium	Refractive index
Air	$1.0003$	Crown glass	$1.52$
Ice	$1.31$	Canada Balsam	$1.53$
Water	$1.33$	Rock Salt	$1.54$
Alcohol	$1.36$	Carbon disulphide	$1.63$
Kerosene	$1.44$	Dense flint glass	$1.65$
Fused Quartz	$1.46$	Ruby	$1.71$
Turpentine oil	$1.47$	Sapphire	$1.77$
Benzene	$1.50$	Diamond	$2.42$