Question

In Young's double slit experiment, if the distance between the first dark fringe and the second bright fringe on the same side of the central maximum is \(1.5\,\text{mm}\), then the distance between the first dark fringe on one side and the second bright fringe on the other side of the central maximum is

• A. \(2.5\,\text{mm}\)
• B. \(1.5\,\text{mm}\)
• C. \(3.0\,\text{mm}\)
• D. \(2.0\,\text{mm}\)

Hint:

In YDSE, \[ \boxed{ \text{Bright fringes: }y_n=n\beta, } \] and \[ \boxed{ \text{Dark fringes: }y_n=\left(n+\frac12\right)\beta. } \] Always mark the fringe positions on the screen before calculating the distance.

Answer 1

The Correct Option is A