Wednesday, June 23, 2010
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INTERFERENCE
Interference of two circular waves
Double Slit Experiment
Two point interference in a ripple tank
Animation of interference of waves coming from two point sources.
Newton's rings
Interference pattern by a circularly symmetric thin film
Fabry-Perot Interferometer
This interferometer makes use of multiple reflections between two closely spaced partially silvered surfaces. Part of the light is transmitted each time the light reaches the second surface, resulting in multiple offset beams which can interfere with each other. The large number of interfering rays produces an interferometer with extremely high resolution, somewhat like the multiple slits of a diffraction grating increase its resolution.
Michelson Interferometer
The Michelson interferometer produces interference fringes by splitting a beam of monochromatic light so that one beam strikes a fixed mirror and the other a movable mirror. When the reflected beams are brought back together, an interference pattern results.
Michelson Interferometer
Interference pattern
DIFFRACTION
The intensity pattern formed on a screen by diffraction from a square aperture
HE-NE LASER
WIDELY USED GAS LASER
OPTICAL FIBRES
USED MAINLY IN COMMUNICATION
Superconducting magnet
Placed in liquid Nitrogen temperature