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    Using a red laser.
    An interference pattern produced on the screen is much brighter in the centre of the screen that at the edges.
    state what causes this effect?
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    (Original post by hellmanking123)
    Using a red laser.
    An interference pattern produced on the screen is much brighter in the centre of the screen that at the edges.
    state what causes this effect?
    The edges of the screen will be further from the source and thus less intense according to the inverse square law. Most of the light will be passing straight through to hit the centre of the screen
 
 
 
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