- #1
steven10137
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Homework Statement
In a Newton's Rings experiment, involving a curved lens on a glass surface, what might have happened to the set-up to see a bright spot at the centre?
2. The attempt at a solution
Well I know that normally we get a dark spot at the centre because of the lambda/2 phase difference which causes destructive interference, but I am a little confused with how a bright spot could be seen at the centre.
My first thought was that perhaps an air gap was left between the centre of the lens and the glass but I'm not really sure.
cheers
Steven