Thus the assembly is certainly low cost but without any compromise on the accuracy of the experiment.
Moreover every component used in the present set up is easily replaceable.
Besides wavelength determination, the present set up can also be used in performing different experiments, namely, studying elliptical and straight fringes and determining the refractive index of a glass plate.
We feel that this low cost apparatus with smooth and precise distance variation technique will be very useful in every physics laboratory.