In a Young's experiment,the paths from the slits to a point on the screen differ in length causing constructive interference at the point.Which of the following path difference would cause this constructive interference?
A) 5λ/2
B) 3λ/4
C) 4λ
D) None of the above.

Question

Quizplus · Accepted Answer

For constructive interference, the path difference between the waves should be an integer multiple of the wavelength. Hence, if the path difference is equal to 2λ, 3λ, 4λ, etc., then there will be constructive interference at the point. Therefore, we can see that option C) 4λ satisfies this condition and would cause constructive interference.

In a Young's Experiment,the Paths from the Slits to a Point