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What are conditions for a bright and a dark fringe?
Bright fringes occur when the path difference between two waves is a whole number of wavelengths, leading to constructive interference. Dark fringes occur when the path difference is a half-integer multiple of the wavelength, resulting in destructive interference.
What is meant by fringe width?
Fringe-width is defined as the sepration between two consecutive dark or bright fringes on the screen.
Why is the central fringe dark or light?
The central fringe in the double-slit interference pattern is typically dark because it results from destructive interference between the light waves from the two slits. This occurs when the two waves are out of phase and cancel each other out, resulting in a dark fringe.
Why do you observe the dark and bright colored fringes?
Dark and bright fringes are observed in interference patterns due to the constructive and destructive interference of light waves. When two waves are in phase, they interfere constructively resulting in a bright fringe. When they are out of phase, they interfere destructively producing a dark fringe. This phenomena is a result of the wave nature of light.
Why in newton's ring's experimental setup central ring is bright instead of dark?
Because the intensity is maximum at the centre. Therefore the central spot is bright and not dark.
What are the differences in the interference patterns produced by a double slit versus a single slit?
The interference pattern produced by a double slit consists of multiple alternating bright and dark fringes, while a single slit produces a central bright fringe with weaker, less defined fringes on either side.
Will the central ring be bright or dark?
It's bright during most of the show ... although they do dim it somewhat during the trapeze lady ... and then it's dark after the audience is gone.
What are the differences in the interference patterns produced by a single slit versus a double slit?
The interference pattern produced by a single slit consists of a central bright fringe with alternating dark and bright fringes on either side. In contrast, the interference pattern produced by a double slit consists of multiple bright fringes with dark regions in between, known as interference fringes. The double slit pattern is more complex and exhibits a higher degree of interference compared to the single slit pattern.
Which device could produce a diffraction pattern consisting of a central bright fringe with parallel secondary fringes that decrease in intensity with increasing distance from the center of the screen?
A double-slit device would produce a diffraction pattern with a central bright fringe and parallel secondary fringes that decrease in intensity with distance from the center of the screen. This pattern is a result of interference of light waves passing through the two slits.
In a light interference pattern alternate dark and bright fringes are seen. Why are the bright fringes formed?
The bright fringes are formed due to constructive interference of light waves. This occurs when the peaks of two waves align, reinforcing each other and producing a bright fringe. The dark fringes result from destructive interference, where the peaks of one wave align with the troughs of another, causing them to cancel each other out.
What is the formula for fringe width?
Fringe width (for dark and bright bands): D * wavelength / d where, D = distance between screen and coherent sources (metres), wavelength = wavelength of light used is experiment (nanometres), d = distance between the 2 coherent sources (millimetres).
What is the fringe width of NEWTON RING?
The fringe width of Newton rings is the distance between two consecutive bright or dark fringes observed when a plano-convex lens is placed on a flat glass plate. It is given by the formula [ w = \lambda \cdot R / (D - R) ], where ( \lambda ) is the wavelength of light, ( R ) is the radius of curvature of the lens, and ( D ) is the diameter of the bright ring.
