Question

White light is used in Young's double slit experiment. Separation between slits is $y$ and the screen is at distance $x$ from slits $(x > > y)$. Which of these wavelengths is missing in front of one of the slits?

• A. $\frac{y^{2}}{x}$
• B. $\frac{y^{2}}{2 x}$
• C. $\frac{y^{2}}{4 x}$
• D. All of these

Answer 1

Answer: (A)

Distance of minima from central maxima
$y_{1}=\frac{(2 m-1) \lambda D}{2 d}$
$y_{1}=\frac{y}{2}, d=y, D=x$
$\lambda=\frac{y^{2}}{(2 m-1) x}$
$m=1,2,3, \ldots$