Winter solstice
Geometry
Level
2
Approximately how long is the daytime (the time between sunrise and sunset) on the \(21^\text{st}\) of December in Paris?
Note: Paris is on the latitude \(\phi = 49^\circ.\) The Earth is tilted at an angle of \(\psi = 23.4^\circ\) relative to its axis of rotation.
by
Markus Michelmann