Summer solstice and the longest day of the year
Initially, the days and nights due to the rotation of the earth, with the side facing the sun knows the day and the night side caused other experiences. Since the earth on its axis is inclined at an angle of 23 ° 26 ‘, at a point which is fixed in a position such that it is inclined either towards or away from the sun. Such an orientation, the apparent position of the sun is perpendicular to the Tropic of Cancer and the Tropic of Capricorn, is called the summer solstice. It happens twice a year (once if the inclination of the Earth’s axis is tilted toward the sun, and once when the slope tilted away from the sun.
This phenomenon and the apparent position of the sun in the sky, the sun extreme north or south, when the tower will determine the duration of a day. When the sun is at the Tropic of Cancer, the northern hemisphere receives more sunlight and therefore have. Longer days and shorter nights if there are on the Tropic of Capricorn, things work the other way, and in the southern hemisphere experiencing daylight for a longer period. In other words, the hemisphere of the planet, the sun is inclined towards more light and thus teaches days here are long and the nights short.
Basically, what happened the day of the summer solstice occurs in relation to a particular hemisphere the longest day of the calendar year of the hemisphere. The length of a day from one region to another, depending on the latitude of the site. While the regions near the equator experience 12 hours of daylight along tropical experience 14-15 hours of daylight that day. Interestingly, provides places around 66.5 ° N and 66.5 ° S light experiments for 24 hours in the summer, the inclination of the earth. These areas directly Circle of illumination of a part of the year, places control information such as Canada, Greenland, Alaska and Sweden, a strange phenomenon called “midnight sun”, where the sun is visible even at midnight.