Time
As described by Einstein’s theory of General Relativity, light cannot escape from a black hole because this stands still.
What is time?
True or false: there is a luminiferous ether through which light waves propagate.
False
True or false: a clock on the summit of Mount Everest will run faster than a clock at the base of Mount Everest
True
Light can be described as both particles and this hand gesture.
Radioactive dating examines this decaying element in objects to determine its age.
What is Carbon 14?
Type 1A supernovae are called “standard candles” because they emit the same amount of light. They help provide what kind of measurement to the observable edge of the universe?
Galileo Galilei observed this object and discovered isochronism, in which the period of its oscillation is always constant, despite its amplitude.
What is a pendulum?
The photoelectric effect explains why this particle is ejected from the surface of an object when light shines on it.
What is an electron?
This concept, connected to Einstein’s theory of special relativity, explains why the time between two events can appear different for observers moving at different speeds. An example of this concept is the Twin Paradox.
What is time dilation?
This conceptual object perfectly absorbs light of all wavelengths, and transforms it into heat, which it radiates out.
What is a black body?