BIPRISM

Here we determine the wavelength of a monochromatic light by forming interference fringes.

EDSER-BUTLER FRINGES

Here we determine the thickness of air film enclosed between two semi silvered glass plates.

SEARLE'S VIBRATION MAGNETOMETER

Here we compare the magnetic moments of two bar magnets.

DEFLECTION MAGNETOMETER

Here we determine the pole strength and hence the moment of a bar magnet, keeping it vertically on the arms of a deflection magnetometer.

POTENTIOMETER- e.m.f of a Thermocouple

Here we measure the e.m.f of a thermocouple at different temperatures using a potentiometer, assuming the e.m.f of an accumulator.

CAREY FOSTER'S BRIDGE

Here we determine the temperature coefficient of resistance of the given coil wire.

MIRROR GALVANOMETER

Here we determine the figure of merit for current of the moving coil galvanometer. The principle utilised is that the current sensitivity of a mirror galvanometer is the current required to produce a deflection of one millimeter on a scale placed at a distance of one meter from the mirror.