Waec Model Questions Vol1 2021 Physics Question 48
Practice objective / multiple choice question 48 from the 2021 Waec Model Questions Vol1 Physics examination.
In a double‑slit experiment the slit separation is 0.30 mm and the screen is 2.0 m from the slits. When the experiment is performed in air the distance between successive bright fringes is 1.2 mm. When a glass slab of unknown refractive index n is placed directly behind the slits, the fringe spacing reduces to 0.9 mm. Determine (i) the wavelength λ of the light in nanometres, and (ii) the refractive index n of the glass.
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About This Question
This is Waec Model Questions Vol1 2021 Physics Question 48. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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