Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Wave Optics

Question:

What is the path difference for destructive interference (if n is an integer)?

Options:

$nλ$

$(n+1)\frac{λ}{2}$

$(2n+1)\frac{λ}{2}$

$(n+1)λ$

Correct Answer:

$(2n+1)\frac{λ}{2}$

Explanation:

Destructive interference occurs when the path difference is odd intergral multiple of $\frac{\lambda}{2}$ i.e $(2n+1)\frac{λ}{2}$.

The correct answer is Option (3) → $(2n+1)\frac{λ}{2}$