The distance between the surface at the center of a reflective surface and its focal point is equal to half the radius of curvature of the surface.
The term you are referring to is the focal length, which is the distance between the surface of a reflective surface (such as a mirror) and the focal point.
the questions is " do you know what is the shortest distance betwen two placs on a globes's surface? "
It is the shortest distance between the conductors measured along with the surface of insulators.
focal length..
focal length..
The ozone layer is spread up to a great place. The estimate distance from the surface is 15 to 35 kilometers.
The surface-distance from the north pole to the south pole is 20,004 km or 12,430 miles.
scale
In terms of physical measurement, the distance between Earth and heaven is not known as heaven is considered a spiritual or metaphysical realm, not a physical location in space. Different belief systems and cultures have their own interpretations of where or what heaven is.
The distance between the listener and the reflecting surface, as well as the reflective properties of the surface, can affect the clarity of an echo. The further the distance and the more absorbent the surface, the less clear the echo will be.
It means The relationship between distance on a map and on the earth's surface.