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Calculate the distance between 5^(th) an...

Calculate the distance between `5^(th)` and `15^(th)` bright fringes in an interference pattern obtained by experiment due to narrow slits separated by `0.2mm` and illuminated by light of wavelength `560mm`. The distance between the slit and screen is `1m`.

Text Solution

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`x_(n)=(nlambdaD)/(d)`
`x_(5)=(5xx560xx10^(-9)xx1)/(0.2xx10^(-3))=14xx10^(-3)m`
`x_(15)=(15xx560xx10^(-19)xx1)/(0.2xx10^(-3))=42xx10^(-3)m`
`x_(15)-x_(5)=(42-14)xx10^(-3)=28xx10^(-3)m`
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