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A thin film is observed in white light. The color of the film seen at a particular point depends upon (a)Location of observer (b)Width of the source (c) Distance of the source (d) Brightness of the source

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A thin film is observed in white light. The color of the film seen at a  particular point depends upon
(a)Location of observer  
(b)Width of the source  
(c) Distance of the source  
(d) Brightness of the source
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(a)Location of observer
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