The sun rises two hours earlier in arunachal pradesh as compared to gujarat in the west but the watches show the same time. how does this happen? also explain why few years ago few scientists requested advancing indian standard time by half an hour.
Answers
The sun rises in the East. Hence, Time is ahead by 4 minutes. Every meridian (Longitude) While going towards east from the west. Gujarat is located as 68 degree 7 minute east and the easternmost point of Arunachal pradesh is at 97 degree 25 minute east. (Almost 30 DEGREE Longitude is away from each other) (Thus the difference is of 2 hours (4×30) = 120 minute or 2 hours).
But the Local time of 82 degree 30 minute East is taken as standard time throughout the country. And all the watches in the country run according to the time of 82 degree 30 minute east. And It is also I.S.T (Indian Standard Time).
This is because of different longitude but Same IST (Indian Standard Time).
-Arunachal Pradesh and Gujarat are located at a different longitudes. But, Both Longitudes have same Time.
As, Gujarat and Arunachal Pradesh have different longitudes, So it is found that, the Sun rises earlier in Arunachal Pradesh as compared to Gujarat. We know that, The Time of each location in a specific country is same. Either it's Longitudes are different or any there is far distance between them. Therefore, Sunrises earlier in Arunachal Pradesh due to their different Longitudes.
-Gujarat lies between 68° E and 74° E longitude.
-Arunachal Pradesh is located between 91.20° E and 97.30° E longitude
-Arunachal Pradesh is located at Eastern part of India. It means that, there will be very Huge distance in time.
Reason for time difference:
1) India is located at 30° longitude. (Time will be same everywhere even there are different longitudes).
2) There is 30° longitudes between Arunachal pradesh and Gujarat.
3) 30°* 4 mins = 120 mins
4) 120 Mins is equal to 2 Hours.
Hence, There is a 2 hours time different between Gujarat and Arunachal Pradesh but watches shows same time.