In Michelson interferometer to switch the fringe from bright to dark, the mirror should be displaced through
Correct answer: C. λ/6
- A. λ
- B. λ/3
- C. λ/6
- D. λ/4
Explanation
Explanation: In Michelson interferometer, to switch the fringe from bright to dark (or vice versa), the mirror needs to be displaced by a distance equal to half of the wavelength (λ/2). Since the displacement for switching from bright to dark corresponds to half a wavelength, the correct option is λ/6.
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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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