Question: What happens to light that is sent down a gravity well?
About the article "General relativity", section "Gravitational time dilation and frequency shift".

Candidate passages:
Assuming that the equivalence principle holds, gravity influences the passage of time.
Light sent down into a gravity well is blueshifted, whereas light sent in the opposite direction (i.e., climbing out of the gravity well) is redshifted; collectively, these two effects are known as the gravitational frequency shift.
More generally, processes close to a massive body run more slowly when compared with processes taking place farther away; this effect is known as gravitational time dilation.
Gravitational redshift has been measured in the laboratory and using astronomical observations.
Gravitational time dilation in the Earth's gravitational field has been measured numerous times using atomic clocks, while ongoing validation is provided as a side effect of the operation of the Global Positioning System (GPS).
Tests in stronger gravitational fields are provided by the observation of binary pulsars.
All results are in agreement with general relativity.
However, at the current level of accuracy, these observations cannot distinguish between general relativity and other theories in which the equivalence principle is valid.
Some theories, most notably special and general relativity, suggest that suitable geometries of spacetime, or certain types of motion in space, may allow time travel into the past and future.
Concepts that aid such understanding include the closed timelike curve.
Albert Einstein's special theory of relativity (and, by extension, the general theory) predicts time dilation that could be interpreted as time travel.
The theory states that, relative to a stationary observer, time appears to pass more slowly for faster-moving bodies: for example, a moving clock will appear to run slow; as a clock approaches the speed of light its hands will appear to nearly stop moving.
The effects of this sort of time dilation are discussed further in the popular "twin paradox".
These results are experimentally observable and affect the operation of GPS satellites and other high-tech systems used in daily life.
A second, similar type of time travel is permitted by general relativity.
In this type a distant observer sees time passing more slowly for a clock at the bottom of a deep gravity well, and a clock lowered into a deep gravity well and pulled back up will indicate that less time has passed compared to a stationary clock that stayed with the distant observer.
These effects are to some degree similar to hibernation, or cooling of live objects (which slow down the rates of chemical processes in the subject) almost indefinitely suspending their life thus resulting in "time travel" toward the future, but never backward.
They do not violate causality.
This is not typical of the "time travel" featured in science fiction (where causality is violated at will), and there is little doubt surrounding its existence.
"Time travel" will hereafter refer to travel with some degree of freedom into the past "or" future of proper time.
Many in the scientific community believe that time travel is highly unlikely, because it violates causality i.e.
the logic of cause and effect.
For example, what happens if you attempt to go back in time and kill yourself at an earlier stage in your life (or your grandfather, which leads to the grandfather paradox)?
Stephen Hawking once suggested that the absence of tourists from the future constitutes a strong argument against the existence of time travel— a variant of the Fermi paradox, with time travelers instead of alien visitors.
As of 2013 there is no experimental evidence of time travel, making it a mere hypothesis as opposed to an empirical fact. 
A childless woman tells the Sun that if she could only have a child, the Sun could take the child when she was twelve.
Then she has a daughter, Maroula or Letiko.
When Maroula is twelve, a fine gentlemen meets her while she is gathering herbs and tells her to remind her mother of her promise.
In Megas's variant, this happens twice; the first, the mother instructs Maroula to tell the Sun that she forgot; the second, the Sun has her put an apple in her headdress to remind her by falling out in the evening; the mother keeps her a long time, and finally sends her again, and the Sun returns, so she tells Maroula to tell the Sun that he may take "it" when he finds it, and so he takes Maroula.
In Lang's variant, her mother stops up the house to keep all sunlight out, but she leaves open a key hole, and when the light falls on Letiko, she vanishes.
In both variants, she is miserable in the Sun's house and makes up excuses.
In Megas's, she scratches her own cheeks and blames, in turn, a cockeral, a cat, and a rose bush for scratching her.
In Lang's, she is sent after straw; she sits in the shed and laments being taken from her mother; when she returns, she claims her shoes were too large and slowed her, so the Sunball shrinks them.
The same thing happens when she is sent for water, except that she says her petticoat was too long; and then when she is sent for slippers, and says her hood blocked her sight.
Finally, the Sun realized she is unhappy and decided to send her home.
He summons animals to ask whether they would take her home, and then what they would eat on the way.
In Megas's variant, both lions and foxes say they will eat Maroula; only foxes say the same in Lang's.
Then he asked two hares in Lang's version and two deer in Megas's, and they would eat grass and drink from streams.
They set out.
When they became hungry, the animals told her to climb a tree while they ate.
In Megas's version, a lamia sent her three daughters to get water from the well; each one saw Maroula's reflection in the well, took it for her own, and decided she was too pretty to fetch water.
The lamia herself came and realized what it was.
She complained that Maroula had made her leave her bread she was making, and Maroula kept sending her back to finish it before she ate her.
In Lang's version, a lamia just came.
She tried to lure her down by comparing their shoes, but Letiko said hers were finer, and when the lamia said her house needed sweeping, Letiko told her to sweep it and come back.
When she did, the lamia compared their aprons, and then tried to cut down the tree to eat her, but she could not cut it down.
Then she tried to lure her down because she had to feed her children, but Letiko told her to go and do it, and when she left, Letiko summoned the hares and they fled.
The lamia chased after them.
They passed a field and the lamia asked if they had seen anyone; they answered only that they were planting beans.
Or, they passed a mouse that gave answers about what it had been doing, not what it saw, until several questions in.
As she approached home, the dog, the cat, and the rooster each announced her return, and her mother told them to be quiet before her heart broke with grief, but Letiko returned.
The lamia was so close that she took part of one of the hare/deer's tails, but nothing more.
The mother, delighted, silvered its tail for bringing Letiko back to her. 
Episode 68 – "Anti-Gravity Device".
Anti-gravity is a hypothetical force that eliminates the effects of gravity on an object (as opposed to counteracting it).
The MythBusters tested various devices that claimed to produce anti-gravity. 
Pallor mortis (Latin: "pallor" "paleness", "mortis" "of death") is a post mortem paleness which happens in those with light/white skin almost instantly (in the 15–25 minutes after the death) because of a lack of capillary circulation throughout the body.
The blood sinks down into the lower parts (due to gravity) of the body creating livor mortis.
Paleness develops so rapidly after death that it has little to no use in determining the time of death, aside from saying that it either happened less than 30 minutes ago or more, which could help if the body was found very quickly after death.
Also, a living person can look death-pale.
This can happen when the circumstances make the blood escape from the surface of the skin, as in deep shock.
Also heart failure ("Insufficientia cordis") can make the face look gray; the person then also has blue lips.