Fringes are produced with monochromatic light of wavelength 5.45 x 105 cm. A thin glass plate of R.I. (1.5) is then normally placed in one of the paths of interfering waves and the central bright band of the fringe system is found to move into the position, previously occupied by the third bright band from the system. The thickness of glass plate will be (a) 32.7 x 10 cm (b) 32.7 x 105 cm (c) 16.7 x 105 cm (d) 12.5 x 10-5 cm

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Fringes are produced with
monochromatic light of wavelength 5.45 × 10-5
cm. A thin glass plate of R.I. (1.5) is then
normally placed in one of the paths of
interfering waves and the central bright band
of the fringe system is found to move into the
position, previously occupied by the third
bright band from the system. The thickness of
glass plate will be
(a)
32.7 x 10 cm (b)
32.7 x 105 cm
(c)
16.7 x 105 cm (d)
12.5 x 105 cm
Transcribed Image Text:Fringes are produced with monochromatic light of wavelength 5.45 × 10-5 cm. A thin glass plate of R.I. (1.5) is then normally placed in one of the paths of interfering waves and the central bright band of the fringe system is found to move into the position, previously occupied by the third bright band from the system. The thickness of glass plate will be (a) 32.7 x 10 cm (b) 32.7 x 105 cm (c) 16.7 x 105 cm (d) 12.5 x 105 cm
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