The focal lengths of unknown lenses are determined by measuring
the distances of image and object and by Bessel's method. Simple
optical instruments are then constructed with these lenses.
Monochromatic light falls on a plane parallel mica plate. The light rays, reflected at the front surface as well as at the rear surface, will interfere to form a pattern of concentric rings. The radii of the rings depend on the geometry of the experimental setup, the thickness of the ...
Linear polarised light passes through a polarisation filter. Transmitted light intensity is determined as a function of the angular position of the polarisation filter.
Optically active substances cause very slight rotations of the
light polarisation plan, which the method of crossed polarisation
filters is not strong enough to measure. With this method, the
direction of polarisation of the analyser is perpendicular to that
of the polarizer. If ...
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