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With respect to air the refractive index of ice is 1.31 & that of rock salt is 1.54. Calculate the refractive of rock salt with respect to ice.

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Refractive index of ice with respect to air = 1.31
refractive index of rock with respect of air = 1.54
refractive index of rock with respect to ice = 1.54/1.31

1 5 1
see, refractive index = (speed of light in air or vaccum)/( speed of light in that medium)
refractive index of rock salt with respect to ice = (speed of light in ice)/(speed of light in rock salt)
speed of light in ice = c/(1.31)
and, speed of light in rock salt = c/(1.54)
required refractive index = 1.54/1.31 = 1.175 
1 5 1
my pleasure :)
u can mark any ans brainliest..it's totally up to u :)
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