Alhazen offered an explanation of the Moon illusion, an illusion that played an important role in the scientific tradition of medieval Europe.
12.
The SDIH does not explain some illusions, such as the Moon illusion, in which the Moon appears larger when it is near the horizon.
13.
When I calculate the mathematically correct sizes to draw them, they look ridiculously small because that moon illusion works in reverse on a computer screen.
14.
He offered an obscure explanation of the sun or moon illusion ( the enlarged apparent size on the horizon ) based on the difficulty of looking upwards.
15.
Most of the rest say it looks larger and about the same distance away as the zenith moon, with a few people reporting no Moon illusion at all.
16.
And of course the moon being close to the horizon triggers the moon illusion and makes the sighting even more impressive .-- Anonymous, 07 : 33 UTC, November 7, 2007.
17.
In the " moon illusion, " the moon rising or setting over the horizon appears much bigger than the moon directly overhead, even though both moons are exactly the same size.
18.
Through additional works ( by Roger Bacon, John Pecham, Witelo, and others ) based on Ibn al-Haytham's explanation, the Moon illusion came to be accepted as a psychological phenomenon in the 17th century.
19.
Through works by Roger Bacon, John Pecham and Witelo based on Alhazen's explanation, the Moon illusion gradually came to be accepted as a psychological phenomenon, with the refraction theory being rejected in the 17th century.
20.
This is why objects appear smaller when you move farther away from them-- it's not because of an optical illusion like the Moon illusion is .-- Bowlhover 21 : 23, 5 March 2006 ( UTC)
