# Steradian

A steradian (symbol: sr) is the SI unit of solid angle. It is used in three-dimensional geometry, and is analogous to the two-dimensional radian. What is the value of 1 steradian? The value of 1 steradian is the solid angle subtended by a unit sphere at the center of the sphere. What is steradian with example? Steradian is the SI unit of measurement for solid angle. It is defined as the angle subtended by a sphere at its center. For example, a sphere with a radius of 1 meter has a steradian of 4π.

#### What is the formula of steradian?

The formula for steradian is:

Steradian = pi * (Radius of Sphere / Distance from Center of Sphere)^2

Steradian can also be expressed as a function of angle, such as:

Steradian = (Angle in Radians)^2 / 2

What is difference between Radian and steradian? Radian and steradian are units of measurement that are used to quantify angles. A radian is defined as the angle subtended by a circular arc that has the same length as the radius of the circle. A steradian is defined as the solid angle subtended by a spherical surface that has the same area as the surface of the sphere. Both units are commonly used in the field of mathematics, but they have different applications. Radians are typically used to measure angles, while steradians are used to measure solid angles. Where is steradian used? The steradian is a unit of solid angle used in three-dimensional geometry. It is defined as the angle subtended by a unit sphere at a unit distance from the observer. Solid angle is a measure of how much of the sky is visible from a given point. It is used in astronomy to describe the field of view of telescopes and in cosmology to describe the size of the universe.