Passage - II : Liquids do not have definite shape and size, they are taken in a vessel. Their expansion (or) contraction takes place with respect to the container in which they arc considered. The volume coefficient of expansion relative to the vessel is termed as coefficient of apparent expansion ( gamma_(a) ) and the volume coefficient of expansion of the liquid is termed as absolute ( gamma_(R) "or" gamma_(L ) ). In some of the arrangements mentioned as per the instructions. solve the problems. A thread of liquid in a uniform capillary tube of length L, as measured by a ruler. The temperature of the tube and the thread of the liquid is raised by 'Delta theta'. If gamma is the coefficient of volume expansion of the liquid and alpha is the coefficient of linear expansion of the material of the tube, then the increase in length 'Delta L' of the thread as measured by the ruler will be