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Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes is continuously changing during the year.
Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.
By varying the position of the light source, you can examine the shades projected onto the planes of the coordinate system.
The first calendars and time-measuring instruments were already used by ancient Eastern civilisations.
An Ames room is a distorted room that is used to create an optical illusion.
The information gathered by the eye is misinterpreted by the brain.
The Earth is divided into 24 time zones. Standard time is the time used within time zones.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.