31. The radiation pressure then slowly rockets the pulsar away. 32. For example, the evolution of the outer rings of Saturn is significantly influenced by radiation pressure . 33. The gradient of radiation pressure is equal to the momentum transfer absorbed from the radiation, giving: 34. Numerous authors make a distinction between the phenomena of Rayleigh radiation pressure and Langevin radiation pressure . 35. Several factors affect the radiation pressure on a body or a cloud of particles or gases. 36. Numerous authors make a distinction between the phenomena of Rayleigh radiation pressure and Langevin radiation pressure. 37. There is also Poynting Robertson effect drag, due to electromagnetic radiation pressure , not net electric charge. 38. This implies that the sodium atoms are driven away from the comet's head by radiation pressure . 39. It can be shown this change is due to an increase in radiation pressure in massive stars. 40. The radiation pressure in the metamaterial is also negative because the force is defined as } }.