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Per NCERT, kerosene (n = 1.44) is OPTICALLY DENSER than water (n = 1.33) — though kerosene's MASS density is LESS than water's. What does this illustrate?
AKerosene is heavier than water
BBoth densities are identical
COptical = mass density always
DOPTICAL DENSITY and MASS DENSITY are different — optical density refers to the medium's effect on light speed (refractive index), not its physical mass density
Answer & Solution
Correct answer: D. OPTICAL DENSITY and MASS DENSITY are different — optical density refers to the medium's effect on light speed (refractive index), not its physical mass density
Per NCERT §9.3.2, optical density ≠ mass density. The other options misstate.
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