MCQ
In a $YDSE$ light of two different wavelengths ( $\lambda_1$ & $\lambda_2$) are incident normal to the plane of slits. The $n^{th}$ maxima of $\lambda_1$ coincides with the $m^{th}$ maxima of $\lambda_2$ exactly in front of one of the slits.
Given $D = \ 1.5\ m$
$d = 3\ mm$
$4500 \ Å < \lambda_1 , \lambda_2 < 7000\ Å$
then $n, m$ and $\lambda_1$ are
- A$3,4,4000\ \mathop A\limits^0$
- ✓$5,6,6000\ \mathop A\limits^0$
- C$2,3,5000\ \mathop A\limits^0$
- D$4,5,3000\ \mathop A\limits^0 $
