Daglängd

Daglängd refers to the duration of daylight in a particular location over the course of a year. It is primarily determined by the Earth's axial tilt and its orbit around the Sun. As the Earth orbits the Sun, its tilted axis causes different hemispheres to receive more direct sunlight at different times of the year. This variation in solar angle and the duration of daylight is responsible for the seasons.

Locations closer to the equator experience relatively consistent daglängd throughout the year, with minor variations. Conversely, locations at higher latitudes experience more extreme variations. During the summer solstice, these regions receive the longest period of daylight, while during the winter solstice, they experience the shortest. The phenomenon of the midnight sun, where the sun remains visible for 24 hours, occurs in regions within the Arctic and Antarctic Circles during their respective summer months due to the Earth's tilt. Similarly, polar nights, where the sun remains below the horizon for 24 hours, occur during the winter months. The precise duration of daglängd at any given latitude and date can be calculated using astronomical formulas.