Question

The relation between phase difference and path difference is

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

Answer 1

Answer: (A)

$\Delta\phi=\frac{2\pi}{\lambda}\left(\Delta x\right)$

Answer 2

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