What is the latitudinal and longitudinal extent of India. How to calculate our standard meridian. state the importance of standard meridian.
Answers
What is the latitudinal and longitudinal extent of India?
. The latitudinal and longitudinal extent of India is 20.5937° N, 78.9629° E
How to calculate our standard meridian ?
.To find the time meridian of a country, take the westernmost longitude and the easternmost longitude of that country, take the mean, and find the nearest multiple of 7.5 degree. As India's longitudinal extent is from 68° 7' 53" E to 97° 24' 47" E. The mean comes out to be 82°46'20".
State the importance of standard mmeridian ?
. India is a large country. It covers a long range of longitudes (67⁰ E to 97⁰ E ) As we know that variation in time is caused by longitudinal difference, so the time difference between the westernmost and the easternmost longitudes of India should be very large.
For example, the time of Arunachal Pradesh should be two hours ahead of Gujarat, but such a situation could cause inconvenience in the activities like transmission of information across different parts of the same country.
To avoid this, we designate the 82⁰ 32' E longitude as Standard Meridian.
The time at this longitude is accepted all across India as the Indian Standard Time.