Young’s double slit experiment

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Presentation transcript:

Young’s double slit experiment Division of Wavefront

Michelson Interferometer Division of Amplitude

Effective Arrangement

Fringe Conditions Dark

Circular Fringes

Central Dark Fringe

Fringe Spacing

Increasing d

Measuring Wavelength

Close Spectral Lines Example Sodium 589.0 nm and 589.6 nm

Concordance

Discordance

Michelson Interferometer Observer Year Arm length (in m) Michelson 1881 1.2 Michelson & Morley 11.0 1887 Miller 1902-1926 32.0 1929 Michelson et al 25.9 21.0 Joos 1930

LIGO

Ligo Arm Length 4 km Hanford and Livingston in USA Caltech, MIT and other US Universities

Gravitational Waves

Ligo

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