Theory question 206
Latitude, Longitude and Time(a) Highlight four effects of the revolution of the earth. (b) A boxing tournament is scheduled to start at 8.00 p.m. local time in Los Angeles, 75°W. At what time should boxing fans in Nigeria, 15°E, switch on their televisions to watch the commencement of the match?
Show the model answer
Model answer
(a) Changes of seasons; varying lengths of day and night through the year; changes in the altitude of the midday sun; the overhead sun's apparent movement between the tropics; perihelion and aphelion; determines the length of the year (365¼ days) and leap year.
(b) Difference in longitude = 75° + 15° = 90°; time difference = 90 × 4 minutes = 6 hours; Nigeria is east so ahead: 8.00 p.m. + 6 h = 2.00 a.m. the next day.
Explanation
East of a place gains time; add the hours.