Question

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?

Answer 1

Explanation:

There is a time lag of 2 hours from Gujarat to Arunachal Pradesh it means the sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat in the West but the watches show the same time the Earth takes 4 minutes to rotate through 1 degree of longitude therefore the time taken by the earth to rotate through 15 degree longitude is a 1 hour since, India has a longitudinal extent of 30 degree so there is a time difference of 2 hours between Arunachal Pradesh and Gujarat but the watches are set for all the parts of the country according to the Indian Standard Time measured at 82 and half degree longitude this is the reason why the watches show the same time everywhere in India

Answer 2

Answer :

The latitudinal and longitudinal extent of the mainland is about 30°. Despite this fact, the east-west extent appears to be smaller than the north-south extent. From Gujarat to Arunachal Pradesh there is a time lag of two hours. Hence, time along the Standard Meridian of India (82°30’E) passing through Mirzapur (in Uttar Pradesh) is taken as the standard time for the whole country. The latitudinal extent influences the duration of the day and night, as one moves from south to north.

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