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प्रश्न
Why is it 5.30 p.m in India when it is 12.00 noon in London?
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उत्तर
India and the United Kingdom lie on different longitudes. Each degree of longitudes corresponds to a difference of four minutes. This is because the earth rotates 360° in 24 hours, 1° in 4 minutes. The standard meridian of India is 82° 30′ E, and that of London is 0°. This means a difference of 4 minutes x 82.5 = 330 minutes = 5.5 hours. So when it is 12 noon in London, it is 5.30 p.m. in India.
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संबंधित प्रश्न
Give a reason for the lines of longitude are also called Meridians of longitude.
Make a detailed study of finding time with the help of longitudes. Give one practical example.
How can you say that the use of ‘Local Time’ is very inconvenient nowadays in practical life?
Give a reason for the following :
The opposite meridians of longitude form a Great Circle.
What adjustment has to be made when ships cross the International Date Line?
OR
Explain why a day appears to be lost in sailing round the world from east to west and gained when travelling from west to east.
What will be the local time at Madras 80°E? When it is 9 P.M. in New York at 74° W?
What do you mean by local time?
Fill in the blanks.
The Standard Meridian of India is ____________________.
The imaginary lines drawn vertically on Earth.
How many times would the sun pass overhead a line of longitude?
