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24 February, 15:10

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then

The fringes stay the same brightness and get closer together.

The fringes stay the same brightness and get farther apart.

The fringes stay in the same positions but get dimmer and wider.

The fringes stay in the same positions but get brighter and narrower.

The fringes get brighter, narrower, and closer together.

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  1. 24 February, 15:34
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    When the number of slits increases, the intensity of fringes increases.

    So, the fringes appear to be more bright.

    As we know that the fringe width is inversely proportional to the number of slits, so as the number of slits increases, the fringe width decreases, hence the fringes are narrower, bright and close together.
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Home » Physics » In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.
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