Answer
the lines will remain in place
Work Step by Step
This is a diffraction grating, so we can look at equation (36-25) to see how the position of the lines, $ \theta$, is affected by increasing the amount of slits, N;
$d\sin \theta = m \lambda $ where $m=1,2,3,....$ (maxima)
Because the distance between slits, d, and the order, m, and the wavelength, $\lambda$, will remain the same for each light, the position will also remain the same.
