Q. What are the differences between fringes obtained in Newton's ring experiment and those produced by a bi-prism.
Difference between Bi-Prism Fringes and Newton's rings
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Newton's Rings
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Bi-Prism Fringes
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These fringes (rings) are formed by the way of division of amplitude.
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These fringes are formed by the way of division of wave front.
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These rings are circular in shape.
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These fringes are straight in general.
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In Newton's rings centre fringe may be dark or bright.
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Centre fringe is always bright.
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Fringe width is not constant.
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The width of all the fringes is constant.
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Broad light source is required to produce these rings.
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Point (Narrow) light source is used to obtain these fringes.
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