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A thin sheet of glass (μ = 1.5) of thickness 6 microns introduced in the path of one of interfering beams of a double slit experiment shifts the central fringes to a position previously occupied by fifth bright frigne. Then the wavelength of the light used is
A. |
`6000overset{o}{A}` |
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B. |
`3000overset{o}{A}` |
C. |
`4500overset{o}{A}` |
D. |
`7500overset{o}{A}` |