On the day of the vernal equinox, when London time is 12 o clock, what is the longitude of the sun j

First of all, on the day of the vernal equinox, March 21, the global equinox, the sun shines directly on the equator. London is a mid-time zone. London 12 o'clock.

The sun rises above the horizon at 6 o'clock because on March 21, the global equinox of day and night. 15 degrees is a time zone, a time zone is an hour, London 12 o'clock and 6 o'clock, a difference of 6 hours, a difference of 6 time zones. The Earth rotates from the west, the Eastern Hemisphere is earlier than the Western Hemisphere, and the central time zone London is the beginning of the latest day of the day, so the longitude of the Sun ascending from the horizon is 6 degrees West, 90 degrees west longitude, where the Sun rises.

It's relatively simple, please correct any mistakes.

The sun rises above the horizon, which is the critical position between day and night, which translates into a mathematical model where sunlight (parallel light) is tangent to the earth; The position at 12 o'clock at noon is the position where the tangent of the earth is perpendicular to the sun's rays (the maximum angle of the sun's altitude at 12 is 90 degrees).The London longitude is 0, so the critical position is 90 degrees east and west, and because the sun rises, it is 90 degrees west longitude.

On the first floor, the vernal equinox day is March 21.

Already in another question.

London time is the time at 0° meridian. There are 15 hours of daylight in a certain place, and the sunrise time of that place can be obtained from 12-(15 2)=4:30

Because the dry day in any place is equal in the morning and in the afternoon, that is to say, the morning day is an hour long, and the reed must be accompanied by the sunrise at 4:30. This means that the 0° meridian is 18:

180, the winter solstice, the sun directly hit the Tropic of Capricorn, London Datun time 0 o'clock, this talk about the direct point of the sun should be noon, so it is 12 o'clock, and London is 0 degrees of meridian, 12 o'clock including the ride should be 180 degrees of meridian.

London time is 0 o'clock, i.e. 0 degrees longitude is 0 o'clock, then 12 o'clock meridian is 180 degrees.

The geographical coordinates of the direct sunlight point are pinzhi (23 degrees 26 minutes south latitude, 180 degrees north longitude).

London time is the time at 0° meridian. There are 15 hours of daylight in a certain place, and the sunrise time of that place can be obtained from 12-(15 2)=4:30

Because the daylight is the same length in the morning and afternoon at any place, that is, the morning day is an hour long, it must be sunrise at 4:30. This means that the 0° meridian is 18:

At 50, the local time of a certain place is 4:30, so it can be calculated that the time difference between the two places is 14 hours and 20 minutes, that is, the longitude difference is 14*15°+20 4=215°, so the longitude of a certain place is 0° to 215° to the east, that is, 145°W

London time is 0° Because the day is the same length in the morning and afternoon at any place, which means that the morning day is an hour long, it must be sunrise at 4:30. This means that the 0° meridian is 18:

At 50, a certain time is 4:30, so it can be calculated that the time difference between the two places is 14 hours and 20 minutes, that is, the longitude difference is 14*15°+20 4=215°, so the longitude of a certain place is 0° to 215° east, that is, 145°W

Answer B: This question examines the calculation of time. When it is noon in London, i.e. 12 o'clock in the 0 hour zone, and 20 o'clock in the East 8th district time, the city at 20 o'clock in the zone should be located near 120°E.

At 12 o'clock in UTC, the Sun is (due south) of London.

12 o'clock in UTC - that's where the 0 degree meridian is, and the 0 degree meridian passes through London and London is north of the Tropic of Capricorn, so.

At 12 o'clock in international standard time, Taiheng Haoyang is located due south of London.

The answer is to choose a London is the main line of the zero time zone, on the 0 degree meridian, the local time is the time of the district with the song, and the district time is 12 o'clock at noon when the local time, so the sun altitude angle is the highest in the day, so choose A

d. The calculation of the examination area in this question. Two adjacent time zones, with a one-hour difference in zone time. A few time zones between any two time zones can be a few hours apart.

Zone time in the desired time zone = zone time in the known time zone Time zone difference (east plus west minus). 12:00 a.m. at 120°E and 12:00 a.m. at Zone 8 East Zone

00。The time in London's central time zone is 4 o'clock. So option D is selected for this question.