2 The range of longitude for daylight in the eastern hemisphere above the equator is .

The following picture shows the sunlight at 16 o'clock Beijing time, and the following questions are asked.

2) The longitude range of daytime in the eastern hemisphere above the equator is 20° west longitude and 150° east longitude.

Point B is the intersection of the morning line and the equator, so the meridian time of point B is 6 o'clock; The longitude time at point b is 16 6 10 hours different from 16 o'clock Beijing time (120 degrees east longitude), and the longitude difference is 10x15 degrees 150 degrees; 6 o'clock is later than 16 o'clock, indicating that the meridian of point B is on the west side of 120 degrees east longitude, and the longitude of point B is 120 degrees east longitude, 150 degrees, east longitude, 30 degrees west longitude; The longitude of the intersection of the dusk line and the equator is 150 degrees east longitude; So the longitude range of the day hemisphere at the equator is 30° W and 150° E (30° W 0° 150° E).

The extent of the Eastern Hemisphere is 20° W and 160° E (20° W 0° 160° E).

The common part of 30° W and 150° E (30° 0° W and 150° E) and 20° W and 160° E (20° W 0° 160° E) is 20° W and 150° E

Point B is 6 o'clock at this time, 10 hours later than Beijing, so it is advanced to the west by 10*15°, that is, 150°, and Beijing is 120° east longitude, minus 150°, becomes 30° west longitude. In total, there is half of the place between day and night, so 180° is the middle of the day.

Summary. The Atlantic Ocean is at 0 degrees of longitude, the Pacific Ocean is west of the 180 degrees meridian, and the Indian Ocean is 90 degrees east longitude.

Indian Ocean. The Atlantic Ocean is at 0 degrees of longitude, the Pacific Ocean is west of the 180 degrees meridian, and the Indian Ocean is 90 degrees east longitude.

The intersection of 90 degrees east longitude with the equator is located in the Atlantic Ocean.

The Chi Hui Brother Road is the dividing line between the northern and southern hemispheres, and it is also the zero latitude on the earth. The equatorial region is tropical twice a year, with hot weather and high temperatures. The center of the equator coincides with the center of the earth, and it is also the longest coil of latitude on the earth, with a total length of more than 40,000 kilometers.

The equator passes through Gabon, Congo, Zaire, Uganda, Kenya, Somalia, Maldives, Indonesia, Ecuador, Colombia and Brazil, among many other countries. In these countries, people use different signs to indicate the equatorial line. For example, in the Congo, the Bimo equatorial line is represented by a number of small stone pillars arranged in a straight line, called equatorial piles.

Summary. If it is direct sunlight, it is 12:00, and if it is the meridian where the morning line and the equator intersect, it is 6:

00, if it is the meridian where the intersection of the dusk line and the equator is located, it is 18:00. In addition, every 15 degrees of longitude is a time zone, and for a point, 15° east adds 1 hour, 15° west subtracts one hour, and so on.

For the date line (most of the date line coincides with the 180° meridian, but in order to ensure that the date is the same on a piece of land as much as possible, the date line has twists and turns), the west of the date line is the xth day, and the east of the date line is the (x-1).

A place at the equator is a point on the diurnal hemisphere bisector and the intersection of the morning line and the equator.

If it is direct sunlight, it is 12:00, if it is the meridian where the morning line and the equator intersect, it is 6:00, and if it is the meridian where the dusk line and the equator intersect, it is 18:

00。In addition, every 15 degrees of longitude is a time zone, and for a point, 15° east adds 1 hour, 15° west subtracts one hour, and so on. For the date line (most of the date line coincides with the 180° meridian, but in order to ensure that the date is the same on a piece of land as much as possible, the date line has twists and turns), the west of the date line is the xth day, and the east of the date line is the (x-1).

Dear, do you have any other questions?

Is there a situation where there is both direct sunlight and the intersection of the morning or dusk line and the equator?

Dear, the time for this case is in.

In the Northern Hemisphere winter, the direct point of the sun is south of the equator to the Tropic of Capricorn.

For example, on the winter solstice, the sun shines directly on the Tropic of Capricorn. December or 23 of each year. The direct point of the sun is on the Tropic of Capricorn (i.e., 23°26 south latitude), and the southern hemisphere has the longest days and shortest nights.

At higher latitudes in the Southern Hemisphere, the longer the days and the shorter the nights, the polar day phenomenon occurs in the Antarctic Circle.

It is winter in the Northern Hemisphere, especially on the day of the winter solstice, when the sun shines directly on the Tropic of Capricorn.

In the Northern Hemisphere winter, the direct point of the sun is near the Tropic of Capricorn.

The length of day and night and the angle of the sun's altitude vary with the position of the earth at the same latitude.

The direct point of the sun moves repeatedly between the Tropic of Cancer and the Tropic of Capricorn as the earth rotates. The change of seasons on Earth has long been along.

Taking the Northern Hemisphere as an example, during the summer solstice, the sun shines directly on the Tropic of Capricorn, and the solar altitude angle at noon in the Northern Hemisphere is the largest, the day is the longest, the night is the shortest, and the polar day phenomenon occurs in the North Pole. During the winter solstice, the sun shines directly on the Tropic of Capricorn, and the solar altitude angle is the largest at noon in the Southern Hemisphere. The spring and autumn equinoxes are at the equator, so the global equinoxes are equinoxes.

Only at the spring and autumn equinoxes is the sun shining directly on the equator.

So when the Sun's virtual head passes through the equator from north to south, autumn is in the northern hemisphere and spring in the southern hemisphere.

When the Sun passes through the equator from south to north, autumn occurs in the Southern Hemisphere and spring in the Northern Hemisphere.

The situation on the poor orange does not take into account the fact that the vicinity of the equator is summer all year round, and the celery polar region is winter all year round.

Since the pole of the "terrestrial hemisphere" is located at the 0° meridian, it can be inferred that the range of the "terrestrial hemisphere" on the equator is 90°W to the east to 90°E, combined with the longitude range of 160°E in the western hemisphere to 20°W, and the longitude range of the equator located in the "terrestrial hemisphere" and the collapse in the western hemisphere is 20°W to 90°W westward

Slip selection: b