### What does **solid angle** mean?

# Definitions for solid angle

sol·id an·gle

#### This dictionary definitions page includes all the possible meanings, example usage and translations of the word **solid angle**.

### Princeton's WordNet

solid anglenoun

an angle formed by three or more planes intersecting at a common point (the vertex)

### Wiktionary

solid anglenoun

The three-dimensional analog of an angle, equivalent to the area of that portion of the surface a unit sphere that it subtends.

### Wikipedia

Solid angle

In geometry, a solid angle (symbol: Ω) is a measure of the amount of the field of view from some particular point that a given object covers. That is, it is a measure of how large the object appears to an observer looking from that point. The point from which the object is viewed is called the apex of the solid angle, and the object is said to subtend its solid angle at that point. In the International System of Units (SI), a solid angle is expressed in a dimensionless unit called a steradian (symbol: sr). One steradian corresponds to one unit of area on the unit sphere surrounding the apex, so an object that blocks all rays from the apex would cover a number of steradians equal to the total surface area of the unit sphere, 4 π {\displaystyle 4\pi } . Solid angles can also be measured in squares of angular measures such as degrees, minutes, and seconds. A small object nearby may subtend the same solid angle as a larger object farther away. For example, although the Moon is much smaller than the Sun, it is also much closer to Earth. Indeed, as viewed from any point on Earth, both objects have approximately the same solid angle as well as apparent size. This is evident during a solar eclipse.

### ChatGPT

solid angle

A solid angle is a three-dimensional angular measurement that quantifies the amount of space an object takes up as observed from a specific point. It is often used in three-dimensional geometry, physics, and astronomy. The unit of solid angle is the steradian (sr), which is a measure of the two-dimensional angular span in three-dimensional space. A full sphere has a solid angle of 4π steradians.

### Freebase

Solid angle

In geometry, a solid angle is the two-dimensional angle in three-dimensional space that an object subtends at a point. It is a measure of how large the object appears to an observer looking from that point. In the International System of Units, a solid angle is a dimensionless unit of measurement called a steradian. A small object nearby may subtend the same solid angle as a larger object farther away. For example, although the Moon is much smaller than the Sun, it is also much closer to Earth. Therefore, as viewed from any point on Earth, both objects have approximately the same solid angle as well as apparent size. This is most easily observed during a solar eclipse.

### Matched Categories

### Numerology

Chaldean Numerology

The numerical value of solid angle in Chaldean Numerology is:

**8**Pythagorean Numerology

The numerical value of solid angle in Pythagorean Numerology is:

**8**

## Translations for **solid angle**

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"solid angle." *Definitions.net.* STANDS4 LLC, 2023. Web. 9 Dec. 2023. <https://www.definitions.net/definition/solid+angle>.

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