This phenomenon is studied and used in the theory of perverse sheaves.

This phenomenon was used in the design of light meters and similar devices.

This phenomenon still exists today and is used by others with different views and purposes.

Many physical phenomena can be used to generate bits that are highly biased, but each bit is independent from the others.

This phenomenon can be used to increase the number of animals mating on a particular day.

This phenomenon can be used in electrical energy harvesting.

The phenomenon in the conductor, the current in the launching structure, is not used.

This phenomenon, called total internal reflection, is used in fiber optics.

Various physical phenomena are used to probe below the surface where scientists cannot directly access the rock.

This phenomenon can be used when focusing a telescope.