angular aperture

Directory

References

Discover

Odissi Indian classical female dancer on white background. (Indian dancer; classical dancer; Indian dance)

6 Classical Dances of India

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Close-up of ostriches (Struthio camelus) necks and heads; location unknown.

6 of the World's Most Dangerous Birds

Bog body. Head of Tollund Man. Died at about age 30-40, Dated to about 280 BCE early Iron Age. Found Bjaeldskovdal bog Denmark in 1950 near Elling Woman. Most well preserved bog body to date. Human remains mummified in natural peat bogs. mummy, embalm

9 Noteworthy Bog Bodies (And What They Tell Us)

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Panama Canal infographic

Timeline and Map of the Panama Canal

Abstract vector hi speed internet technology background

History of Technology Timeline

angular aperture

optics

Learn about this topic in these articles:

definition

In aperture
…object point is called the angular aperture, which can be taken as a measure of the light-gathering power of the instrument. See also pupil; relative aperture.
Read More