Question

What is the difference between PA and PB ?

• A. $\frac{\lambda}{2}$
• B. l
• C. $\frac{3\lambda}{2}$
• D. 2l

Answer 1

Answer: (D)

2l

Answer 2

For P point difference = D = PA – PB = for second bright

PA - PB = 2\lambda \end{matrix}$$