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The paper deals with the theory of Whistler propagation in a weakly drifting magnetoplasma. The equation for the refractive index (n) for this type of propagation has been derived. It is found that the complex value of the refractive index (n) for this type of propagation is independent of the drift velocity.

The paper deals with oblique wave propagation in inhomogeneous compressible electron plasmas. The refractive index equation has been derived for arbitrarily directed oblique waves in inhomogeneous compressible plasma. The q factor obtained in the present investigation obeys a general third order algebraic equation.

This paper deals with the studies of the mode conversion problems involved in the H-plane semicircular waveguide bent. Expressions for the conversion coefficient for different modes have been derived and calculated as a function of bent angle and the radius of the waveguide.

The paper deals with some aspects of electromagnetic wave propagation in the Martian ionosphere. Using recent data, the effective collision frequency and high frequency conductivity have been calculated for all the three models, namely F2, F1 and E. The real part of the complex refractive index is then calculated for νeff = 0 and νeff ≠ 0. The results are then discussed in some detail and it is concluded that propagation of electromagnetic waves below 100 kHz range is not possible through the Martian ionosphere.

The paper deals with the lateral deviation of radio waves reflected from ionosphere and specifically the effect of collisions on it has been studied for frequency range 1–9 kc/s. It is shown that collisions have negligible effect on the lateral deviation of magnetoionic components.

The paper deals with the propagation of elf and vlf waves in abnormally ionized lower atmosphere. The absorption of these waves in whistler mode propagation has been calculated for three disturbed conditions (PCA event, solar flares and nuclear explosion) and ambient condition of the lower ionosphere. It is found that due to enhanced ion density, elf waves suffer more absorption than that suffered by vlf waves.

This paper deals with the study of light transmission through multi-layered dielectric slab. It is Seen that W type structure is quite suitable. Some important computations for such a structure are presented.

The equation of refractive index for whistler mode propagation in drifting magnetoplasma derived by Agarwal1 is considered for large values of Z, an expression for the complex refractive index being derived. To a first approximation, it is found that the imaginary part of the refractive index is unaffected by the imposed magnetic field, while the real part depends on the longitudinal component of the field.

The effect of large values of Zi = νi/ω and Ze = νe/ω (where νi and νe are the frequency of collisions of ions and electrons respectively and ω is the angular frequency of the propagating wave) on the general refractive index (n = μ—iχ) of the ionosphere has been studied. The complex value of n has been evaluated taking into account the effects of magnetic field, ion and temperature using McLaurin's expansion. For the particular case of no magnetic field, the imaginary component of n is found to be independent of temperature effects.