Refraction in spacetime

Refraction in volume graphics

Refraction in Discrete Raytracing

Refraction is an important graphics feature for synthesizing photorealistic images. This paper presents a study on refraction rendering in volume graphics using discrete ray tracing. We describe four basic approaches for determining the relative refractive index at each sampling position, and examine their relative merits. We discuss two types of anomalies associated with some approaches and th...

Negative refraction in indefinite media

Initial experiments on wedge samples composed of isotropic metamaterials with simultaneously negative permittivity and permeability have indicated that electromagnetic radiation can be negatively refracted. In more recently reported experiments [Phys. Rev. Lett. 90, 1074011 (2003)], indefinite metamaterial samples, for which the permittivity and permeability tensors are negative along only cert...

Refraction in Full-term Babies.

Tim study of refraction in newborn infants may be helpful in understanding the incidence of refractive errors in later years. In this paper, the refractive conditions of 100 newborn infants are reported. Not much work on this subject has been done in the past. Sorsby, Benjamin, and Sheridan (1961) reported the refractive condition of the eyes in the age-group 2 to 23 years, and Hosaka (1963) ob...

Refraction Anomalies in Tanganyikan Children.

Areas Surveyed During 1961, school children aged 8 to 14 years were examined in six different areas of the Central, Lake, and West Lake Provinces of Tanganyika. Those in the neighbourhood of Mwanza (Lake Province) and Mvumi (Central Province) formed part of the group previously reported. Mvumi has suffered from famine intermittently for many years. The latest famine occurred in 1953-54, so that...