question_answer

A cylindrical tube of length 0.2 m and radius R with sugar solution of concentration C produce a rotation of \[\theta \] in the plane of vibration of a plane polarized light. The same sugar solution is transferred to another tube of length 0.3 m of same radius. The remaining gap is filled by distilled water. Now the optical rotation produced is

A)  \[\theta \]     

B)  \[2\frac{\theta }{3}\]   

C)  \[3\frac{\theta }{2}\]   

D)  \[9\frac{\theta }{4}\]