In Michelson's interferometer, if movable mirror is displaced through distance equal to wavelength of monochromatic light then the number of bright fringes observed will be:
Correct answer: B. 2
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
When the movable mirror in Michelson's interferometer is displaced by a distance equal to the wavelength of monochromatic light, a path difference of one wavelength is created. This results in constructive interference at two specific locations, leading to two bright fringes. The other options are incorrect because they do not account for the specific interference pattern created by a one-wavelength displacement.
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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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