Answer:
Step-by-step explanation:
In any grating, the position of bright fringe on the screen depends upon the
width of the fringe . In other words , distance between two consecutive bright
fringes depends upon fringe width . fringe width is given by the expression
\frac{\lambda D}{d}
Where λ is wave length of light used , D is distance of screen and d is d
is distance between two lines.
In the first case
d=\frac{1}{3000}\\
=3.3\times 10^{-4}
In the second case
d = \frac{1}{6000}\\ cm
=1.67\times 10^{-4}cm
So d is less in the later case hence fringe separation will be greater. Colors will be separated widely in this case