1. In the special case of a homogeneous medium , the transmission function becomes 2. For this flow of a homogeneous medium , density and viscosity are constants. 3. These representations are for a homogeneous medium , an approximation in an inhomogeneous medium. 4. So, in a spatially homogeneous medium , time variations can lead to frequency variations. 5. The rays have the simplest form in a homogeneous medium , where they are straight lines. 6. A single equation using 4 ?4 matrices is necessary and sufficient for any homogeneous medium . 7. That is, the scatterer is treated as a perturbation to free space or to a homogeneous medium . 8. Heat diffuses from the source following the above equation and solution in an homogeneous medium follows a Gaussian distribution. 9. The Placzek transient occurs when a population of monoenergetic neutrons of energy E elastically scatter within a homogeneous medium . 10. In 1902, James Jeans found the length scale required for gravitational perturbations to grow in a static nearly homogeneous medium .