Question

In Young's pattern is obtained on a screen interference pattern is obtained on a screen by a light of wavelength $6000A^{\circ }$ coming from the coherent sources $S_1$ and $S_2$ . At certain point p on the screen third dark fringe is formed. Then the path difference $S_{1}P-S_{2}P$ in micron is.

• A. 0.75
• B. 1.5
• C. 3.0
• D. 4.5

Answer 1

Answer: (B)

$x=(2n-1)\frac{\lambda }{2}$