In double slit experiment, the fringe spacing of the diffracted rays increases when:
Correct answer: A. The wavelength of the diffracted rays increases
- A. The wavelength of the diffracted rays increases
- B. The distance between the slits increases
- C. The distance from midpoints of the slits to the central of the fringe on the screen increases
- D. The distance between the screen and the slits decreases
Explanation
Increasing the wavelength of the light source or distance between the slit and the screen would increase the fringe separation. Decreasing slit separation increases the fringe spacing.
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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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