The distance between two dark adjacent fringes is mathematically written as:
Correct answer: A. ∆Y = λL/d
- A. ∆Y = λL/d
- B. ∆Y = λ/dL
- C. ∆Y = λd/L
- D. ∆Y = d/λL
Explanation
This option represents the mathematical expression for the distance between two dark adjacent fringes. It states that the fringe spacing (∆Y) is equal to the product of the wavelength of light (λ), the distance from the source to the screen (L), divided by the separation between the slits (d). This is the correct mathematical representation for the fringe spacing in interference patterns.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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