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If the width of the slits is gradually increased in a double-slit experiment, the diffraction pattern observed on the screen will become less distinct, with broader and less defined fringes. As the slits widen, the interference effects become less pronounced since the light waves from each slit overlap more, resulting in a reduction of the contrast between the bright and dark bands. Eventually, if the slits become too wide, the pattern may resemble a single broad peak rather than a series of interference fringes.

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What is fringe width?

Fringe width is a term used for the width of the first maxima in diffraction. It can also be found by calculation by dividing the wavelength of the light input multiplied by the distance between the slits and the screen by the space between the slits.


What happens if width of the slits increases in double slit diffraction experiment?

If the width of the slits increases in a double slit diffraction experiment, the fringes will become wider and closer together, resulting in a broader diffraction pattern. This change in the width of the slits will affect the overall intensity and distribution of the interference pattern observed on the screen.


In single slit if width of slit increased what will happen?

if the width of one slit is increased relative to the other the slit separation must decrease and since slit sep is inversely proportional to fringeseparationthe fringes become closer together.


What is the expression for fringe width?

The fringe width, often denoted as ( \beta ), in a double-slit interference experiment is given by the formula ( \beta = \frac{\lambda D}{d} ), where ( \lambda ) is the wavelength of the light used, ( D ) is the distance from the slits to the screen, and ( d ) is the distance between the two slits. This expression shows that the fringe width is directly proportional to the wavelength and the distance to the screen, and inversely proportional to the slit separation.


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When point sources are moved further apart, there is a greater amount of interference produced, as evidenced by a larger number of nodes. When the amount of interference increases, the width of any given antinode decreases.


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