Answer:
Get narrower
Explanation:
The equation of diffraction grating is given by :
[tex]d\ sin\theta=m\lambda[/tex]
Where
d is the slit width
m is the order
Also, [tex]d=\dfrac{1}{N}[/tex]
N is the number of slits of a diffraction grating
As the number of slits of a diffraction grating increases, the bright fringes observed on the viewing screen get narrower. Also, the intensity of fringe will increase. So, the correct option is (c).
