Light Fringes Change When Intensity of One Slit is Reduced

[copitlory8]

Monochromatic light passes through two slits and produces light and dark fringes on a screen. Initially, the light from the two slits is of equal intensity. The light from one slit now had its intensity reduced. The intensity at the other is unchanged. What changes if any will occur in the appearance of the fringes on the screen.

 

[collinsmark]

Hello copitlory8,

What do you think? Can you explain why the fringes appear to begin with?