Jamin interferometer .
for determination of change in refractive index in liquid and gases of the order of 10-6
instrument is provided with compensating plates for working with monochromatic
and white light source.
a. plane-parallel optical glass cell with mechanical mounts.
b. a pair of gas cell with plane-parallel widows with mechanical mount.
c. telescope to observe the fringes.
d. stethoscope to measure the pressure difference while looking at the shift of
number of fringes with respect to change in pressure of the gas column
a. sodium vapor lamp(35w) with choke and enclosure.
b. Table lamp.