Abstract. The problems of homogeneous plane symmetric perfect fluid and massive scalar field are investigated in Rosen's bimetric theory. It is shown that a macro cosmological model represented by perfect fluid distribution does not exist and only a vacuum model can be constructed whereas in case of a micro cosmological model represented by a scalar meson field exists and the model is obtained. Moreover it is shown that the massive scalar field cannot be equivalent to irrotational perfect fluid neither through the identification of the corresponding eigenvalues of their energy momentum tensors nor through the transformation as in the case of Tiwary et al and Tabensky and Taub respectively in general theory of relativity.

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