Question

The relation between phase difference and path difference is

• A. $\Delta \varphi =\frac{2\pi }{\lambda }\left(\Delta x\right)$
• B. $\Delta \varphi =2\pi \lambda \left(\Delta x\right)$
• C. $\Delta \varphi =\frac{2\pi \lambda }{\lambda }$
• D. $\Delta \varphi =\frac{2\Delta x}{\lambda }$

Answer 1

Answer: (A)

Phase difference $=\frac{2\pi }{\lambda }\times$ path difference
$\Delta \varphi =\frac{2\pi }{\lambda }\times \Delta x$