A plane as high as the moon?

* The author is part of the community of readers of La Vanguardia.

Oliver Thansan
Oliver Thansan
30 October 2023 Monday 17:06
13 Reads
A plane as high as the moon?

* The author is part of the community of readers of La Vanguardia

Spectacular image of the moon with its very well-defined craters, crossed by the plane, a scene seen and portrayed for La Vanguardia Readers' Photos from Gavà beach, in Baix Llobregat.

The image gives us the impression that the plane is flying so high that it has actually reached the moon and is passing through it in front. And an optical illusion leads us to perceive reality in various ways.

It may be physiological in nature, associated with the effects of excessive stimulation in the eyes or brain (brightness, color, movement, etc.). Or also of a cognitive nature, in which our knowledge of the world intervenes (such as Rubin's vase in which we perceive two faces from the side or a vase indistinctly).

Many artists have taken advantage of optical illusions to give their works a magical appearance, depth, ambiguity and contrasts. In this case, perspective also comes into play in photography.

Another element that stands out is the wake that the plane leaves behind the device. Airplanes form a vapor trail after the kerosene combustion process. The gases expelled by the engine come out at a much higher temperature than the outside temperature.

The sharp contrast in temperatures at a height greater than 30,000 feet (-50 degrees in the atmosphere) causes the immediate condensation of the water present in this mixture of substances. This causes us to see these kinds of elongated ice clouds that dissipate after a short time.