Light Fringes Change When Intensity of One Slit is Reduced

AI Thread Summary
When monochromatic light passes through two slits, it creates an interference pattern of light and dark fringes due to the superposition of waves from both slits. Reducing the intensity of one slit alters the amplitude of the wave from that slit, affecting the overall interference pattern. As a result, the light and dark fringes will become less distinct, with the brighter fringes appearing less intense and the dark fringes potentially becoming less dark. This change occurs because the balance of constructive and destructive interference is disrupted. The overall appearance of the fringes will thus shift, reflecting the intensity adjustment.
copitlory8
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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.
 
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Hello copitlory8,

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

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