In Young's double slit experiment D is the distance between slits and the screen d is the slit separation and A, is the wave length of light used, then the fringe spacing is given by:
Correct answer: A. λ D/d
- A. λ D/d
- B. λd/D
- C. d/λD
- D. Dd/λ
Explanation
In Young's double slit experiment, the fringe spacing is given by the formula λD/d. This formula indicates that the fringe spacing is directly proportional to the wavelength of light used and the distance between the slits and the screen, and inversely proportional to the slit separation. Therefore, Option A (λ D/d) is the correct answer. The other options provide variations of the formula with incorrect arrangements or multiplications of the terms, making them incorrect choices.
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 a plane polarized light:
Velocity of light in vacuum is:
If n represents the order of a half period zone, the area of this zone is approximately proportional to nm where m is equal to :
In Young's double slit experiment using white light:
The appearance of colours in thin soap or oil film results from:
Light reaches the earth from sun in nearly: