Choose the incorrect statement.

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(C) In Young's double slit experiment, the fringe width is given by $\beta = \frac{\lambda D}{d} \Rightarrow \beta \propto \frac{1}{d}$. So, if the di

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The resolving power of the microscope is reciprocal to the maximum separation of two points seen as distinct.

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(C) In Young's double slit experiment, the fringe width is given by $\beta = \frac{\lambda D}{d} \Rightarrow \beta \propto \frac{1}{d}$. So, if the distance between the two slits $(d)$ increases, the fringe width reduces. This statement is correct.$(b)$ In diffraction due to a single slit, the path difference between rays reaching the center of the screen is zero, so its intensity at the center is maximum, i.e.,a bright fringe is observed at the center. This statement is correct.$(c)$ The resolving power of a microscope is defined as $\frac{1}{d_{\min }} = \frac{2 n \sin 	heta}{1.22 \lambda}$. It is the reciprocal of the minimum separation $(d_{\min })$ of two points seen as distinct, not the maximum separation. Thus, this statement is incorrect.$(d)$ Polarisation is possible only in those waves that have vibrations in different directions, which is the case for transverse waves. This statement is correct.Therefore, the incorrect statement is $(c)$.

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