In what substance in this table is the speed of light 2.249 10 8 m/s? Table 25.1

Question

In what substance in this table is the speed of light 2.249 108 m/s?

Table 25.1 Index of Refraction in Various Media Medium Gases at 00C,1atm Air 1.000293 1.00045 Carbon dioxide 1.000139 Hydrogen 1.000271 Oxygen Liquids at 200C Benzene 1.501 Carbon disulfide 1.628 Carbon tetrachloride 1.461 Ethanol 1.361 1.473 Glycerine 1.333 Water, fresh Solids at 20°C 2.419 Diamond 1.434 Fluorite 1.52 Glass, crown Glass, flint 1.66 ice at 20C 1.309 Polystyrene 1.49 1.51 Plexiglas Quartz, crystalline 1.544 1.458 Quartz, fused Sodium chloride 1.544 1.923 Zircon

Explanation / Answer

refractive index = c/v

c is the speed of light

v = spped of lihgt in medium

v = c/n

v = 3*10^8/1.33 = 2.25*10^8 m/s

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