question_answer

While finding the refractive index of a glass slab, the travelling microscope is focused on ink dot on a white paper at position 4.320 cm. When a glass slab is placed on this ink dot on paper, the microscope is raised through 1.80 cm. The thickness of glass  slab of refractive index \[\frac{3}{2}\]

A)  \[\frac{1}{0.8}\,\,cm\]  

B)  \[2.70\,\,\,cm\]

C)  \[5.4\,\,cm\]     

D)  \[1.2\,\,cm\]