In Michelson's interferometer if the movable mirror is displaced through a distance of 0.05mm, 200 fringes are observed. The wavelength of light used in that case is:
Correct answer: A. 5000 Ao
- A. 5000 Ao
- B. 500 Ao
- C. 50 Ao
- D. 5 Ao
Explanation
To calculate the wavelength of light, we use the formula: wavelength = (mirror displacement / fringe count) * 2. Substituting the values given in the question, we get: wavelength = (0.05mm / 200) * 2 = 0.0005mm = 5000 Ao. Therefore, the correct answer is Option A. Options B, C, and D are incorrect as they do not correctly calculate the wavelength using the data provided.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Optics
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.
Practise Optics
665 free Optics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Optics questions
In order to observe two successive bright or dark fringes in Michelson's interferometer, the movable mirror is displaced through a distance of:
Which one of the following is used to measure the wavelength of X-rays?
Which one of the following cannot measure wavelength of X-rays in anyway:
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:
Michelson's interferometer is usually used to determine:
For all practical purposes we consider that light travels in _: