How do I know if I have a central bright fringe?
In a YDSE, the central bright fringe can be identified :
- A. as it has greater intensity than the other bright fringes.
- B. as it is wider than the other bright fringes.
- C. as it is narrower than the other bright fringes.
- D. by using white light instead of single wavelength light.
How are bright fringes formed?
The fringes are formed due to interference of light from the two slits: Where a bright fringe is formed, the light from one slit reinforces the light from the other slit. In other words, the light waves from each slit arrive in phase with each other.
What is the formula to find fringe width?
The distance between any two consecutive dark or bright fringes and all the fringes are of equal lengths. Fringe width is given by, β = D/dλ.
What change would increase the distance between fringes?
Increasing the wavelength of the light increases the spacing between different fringes since the spacing between different fringes is wavelength dependent.
What is the correct expression for fringe width?
⟹ β=dλD
What is the expression for fringe shift in Michelson Morley experiment?
Orbital speed of Earth is v (30km/sec approx.), D is the length of both paths, P is the optical path length. Supposing that the ether wind is along A, thus Pa−Pb=Dv2c2. This means that a displacement in the fringe pattern equal to 2Dv2λc2 should occur if Ether exists.
What are the negative results of Michelson-Morley experiment?
The experiment was performed between April and July 1887 by American physicists Albert A. The result was negative, in that Michelson and Morley found no significant difference between the speed of light in the direction of movement through the presumed aether, and the speed at right angles.
What is meant by fringe shift?
In interferometry experiments such as the Michelson–Morley experiment, a fringe shift is the behavior of a pattern of “fringes” when the phase relationship between the component sources change.
What is a fringe in physics?
In physics, fringes are bands of contrasting brightness or darkness produced by diffraction or interference of radiation with a measurable wavelength.