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Green light of wavelength 5100 Å from a narrow slit is incident on a double slit . If the overall separation of 10 fringes on a screen 200 cm away is 2 cm , find slit separation .A. `5xx10^(-4)` mB. `2.5xx10^(-2)` mC. `2.5xx10^(-4)` mD. `5xx10^(-2)` m |
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Answer» Correct Answer - A `beta=(2)/(10)cm=2xx10^(-3)m` As `beta=(lamdaD)/(d)` `:. d=(lamdaD)/(beta)=(5000xx10^(-10)xx200xx10^(-2))/(2xx10^(-3))` `=5xx10^(-4)m` |
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