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Standard XII

Physics

Optical Path Length

A thin sheet ...

Question

A thin sheet of glass ( $μ$ = 1.5) of thickness 6 micron introduced in the path of one of the interfering beams in a double slit experiment shifts the central fringe to a position previously occupied by fifth bright fringe. The the wavelength of light used is

6000

o A

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3000

o A

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4500

o A

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7500

o A

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Solution

The correct option is A 6000 $o A$
n $λ$ = $(μ - 1) t;$
$∴ λ = \frac{(μ - 1) t}{n} = \frac{(1.5 - 1) \times 6 \times 10^{- 6}}{5} = 6000 o A$

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A thin sheet of glass ( μ = 1.5) of thickness 6 micron introduced in the path of one of the interfering beams in a double slit experiment shifts the central fringe to a position previously occupied by fifth bright fringe. The the wavelength of light used is

The correct option is A 6000 oAnλ = (μ−1)t;∴λ=(μ−1)tn=(1.5−1)×6×10−65=6000oA

A thin sheet of glass ( $μ$ = 1.5) of thickness 6 micron introduced in the path of one of the interfering beams in a double slit experiment shifts the central fringe to a position previously occupied by fifth bright fringe. The the wavelength of light used is

The correct option is A 6000 $o A$
n $λ$ = $(μ - 1) t;$
$∴ λ = \frac{(μ - 1) t}{n} = \frac{(1.5 - 1) \times 6 \times 10^{- 6}}{5} = 6000 o A$