Question

White light is used to illuminate two slits in Young's double slit experiment. The separation between the slits is $b$ and the screen is at a distance $d$ $(>>b)$ from the slits. At a point on the screen directly in front of one of the slits, which wavelengths are missing?

• A. $\frac {b}{d}, \frac {b}{3d},\frac {b}{5d}$
• B. $\frac {b^2}{2d}, \frac {b^2}{4d},\frac {b^2}{6d}$
• C. $\frac {b^2}{d}, \frac {b^2}{3d},\frac {b^2}{5d}$
• D. $\frac {b}{2d}, \frac {b}{4d},\frac {b}{6d}$

Answer 1

Answer: (C)

$\frac {b^2}{d}, \frac {b^2}{3d},\frac {b^2}{5d}$

Answer 2

The correct option is (C): $\frac {b^2}{d}, \frac {b^2}{3d},\frac {b^2}{5d}$.