In the fibres of Dendrocalamus strictus and D. longispathus it has been shown that the refractive indices of the outer wall lamella, parallel and perpendicular to cell length, are correlated not only ...

Students use mirror equations to determine the position and type. Students use mirror equations to determine the position, type, and size of mirror images for curved mirrors mathematically. Optical ...

IN NATURE of August 11, 1921, p. 745, appeared my letter in which I criticised a result stated by Mr. Mallock in NATURE of June 9, p. 456; and also a further brief letter by Mr. Mallock. Further ...

Scientists have demonstrated that negative refraction can be achieved using atomic arrays -- without the need for artificially manufactured metamaterials. Scientists have long sought to control light ...

Calculations of atmospheric refraction are generally based on a simplified model of atmospheric density in the troposphere that assumes the temperature decreases at a constant lapse rate L from sea ...

The density of a salt solution depends on the concentration of the natrue of the salt and its concentration. Salt solutions lead to refraction of light in a concnetration dependent manner. Thus, one ...

From a hilltop, the horizon lies below the horizontal level at an angle called the “dip”. Around 1020 AD, the brilliant Persian scholar al-Biruni used a measurement of the dip, from a mountain of ...