Consider two thermometers T1 and T2 of equal length which can be used to measure temperature over the range θ1 to θ2. T1 contains mercury as the thermometric liquid while T2 contains bromine. The volumes of the two liquids are the same at the temperature θ1. The volumetric coefficients of expansion of mercury and bromine are 18 × 10–5 K–1 and 108 x 10–5 K–1, respectively . The increase in length of each liquid is the same for the same increase in temperature. If the diameters of the capillary tubes of the two thermometers are d1 and d2 respectively, then the ratio d1 : d2 would be closest to
(A) 6.0
(B) 2.5
(C) 0.6
(D) 0.4
