For constructive interference in a double-slit experiment, the path difference is:

1. A $(2n+1)\lambda/2$
2. B $n\lambda$ Correct answer
3. C $\lambda/2$
4. D $(n-1)\lambda$

Solution

Bright fringes: $\Delta = n\lambda$, $n = 0, \pm 1, \pm 2,\ldots$.

About this question

Subject: Physics · Chapter: Optics · Topic: Wave Optics: Interference

This question is part of PrepWiser's free JEE Main question bank. 12 more solved questions on Optics are available — start with the harder ones if your accuracy is >70%.

More Optics questions

• Easy MCQ

  Polarization of light proves that light is:

• Easy MCQ

  The phenomenon of bending of light around edges of obstacles is called:

• Easy MCQ

  In Young's double-slit experiment, fringe width $\beta$ is given by:

• Easy INTEGER

  A convex lens has power 5 D. Its focal length in cm is:

• Easy MCQ

  The lens formula is: