NCERT Solutions for Class 9 Social Science History Chapter 1
Social Science Class 9 History
India – Size and Location 1
Important NCERT Questions Based on new NCERT Books for Session 2022-2023
Questions No: 2 Part: 3
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?
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From the longitudinal extent of India it is observed that the longitudinal expanse is about 30O from west to east. This means that there would be a time-lag of two hours approximately from Gujarat to Arunachal Pradesh. To avoid such differences in local time, Indian standard time has been fixed to give the whole country a uniform time. The local time of the Standard Meridian of 82O30’E is observed as the Standard Time by the whole country. Because of this reason we find that the sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat in the west but the watches show the same time.
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This happens due to the standardization of time within a country. In India, the entire country follows a single time zone, which is the Indian Standard Time (IST).
Although Arunachal Pradesh, located in the northeast, experiences the sunrise earlier due to its geographical position in the eastern part of the country, the clocks across India show the same time. This uniform time system is followed to maintain consistency and convenience across the vast expanse of the country. Consequently, the watches in Arunachal Pradesh, despite experiencing sunrise earlier, are set to the same time as those in Gujarat, which is in the western part of India.