Consider long polystyrene chains in carbon disulphide (athermal solvent). Estimate the correlation length ξ and tube diameter a at vol- ume fractions φ = 0.1 and φ = 0.02. (ii) Consider long polystyrene chains in cyclohexane at 35 ◦C (θ−solvent). Estimate the correlation length ξ and tube diameter a at volume frac- tions φ = 0.1 and φ = 0.02.

any one of the statements could be an accurate comparison. but the statement that would define the correct choice and seal the deal is not even on the list:

"the visibilities of vector-x and vector-y in the drawing provided with the question are identical and nonexistent."

the independent variable, or the one that is intentionally manipulated is the speed.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.