A) \[\Delta \varphi =\frac{2\pi }{\lambda }\Delta x\]
B) \[\Delta \varphi =2\pi \lambda \Delta x\]
C) \[\Delta \varphi =\frac{2\pi \lambda }{\Delta x}\]
D) \[\Delta \varphi =\frac{2\Delta x}{\lambda }\]
Correct Answer: A
Solution :
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