The diameter of the objective lens of microscope makes an angle $\;\beta\;$ at the focus of the microscope . Further, the medium between the object and the lens is an oil of refractive index n . Then the resolving power of the microscope .

Question

(a) Increases with decreasing value of n\[\](b) Increases with decreasing value of $\;\beta\;$\[\](c) Increases with Increasing value of $\;n\;sin 2 \beta\;$\[\](d) Increases with Increasing value of $\;\large\frac{1}{n\;sin 2 \beta}\;$