Young's double slit experiment is carried out by using green, red and blue light, one color at a time. The…
Young's double slit experiment is carried out by using green, red and blue light, one color at a time. The fringe widths recorded are $\beta_{G}, \beta_{R}$ and $\beta_{B}$, respectively. Then,
$\beta_{G}>\beta_{B}>\beta_{R}$
$\beta_{B}>\beta_{G}>\beta_{R}$
$\beta_{R}>\beta_{B}>\beta_{G}$
$\beta_{R}>\beta_{G}>\beta_{B}$
Solution
We know that fringe width, $\beta=\frac{\lambda D}{d}$ $\because \quad \lambda_{R}>\lambda_{\mathrm{G}}>\lambda_{B} \quad \therefore \beta_{R}>\beta_{G}>\beta_{B}$