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In Young's double-slit experiment the di...

In Young's double-slit experiment the distance between the slits is 1 mm and that between slit and screen is 1m. If 10th bright fringe is 5 mm away from the central bright fringe, then wavelength of light used will be

A

5000 Å

B

6000 Å

C

4000 Å

D

8000 Å

Text Solution

Verified by Experts

The correct Answer is:
A
For nth bright fringe `x=(nlamdaD)/(d)`
here `d=1mm=10^(-3),D=1m,n=10,x=5mm=5xx10^(-3)m`, hence
`lamda=(xd)/(nD)=(5xx10^(-3)xx10^(-3))/(10xx1)=5xx10^(-7)m=5000` Å
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Knowledge Check

  • In Young's double slit experiment, the distance between the slits is 1 mm and that between slit and screen is 1 meter and 10th fringe is 5 mm away from the central bright fringe, then wavelength of light used will be

    A
    `5000 Å`
    B
    `6000 Å`
    C
    `7000 Å`
    D
    `8000 Å `

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    A
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    B
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    C
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    D
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    B
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    C
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    D
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