Table of Contents
- 1 Why is 82 degrees 30 minutes East is selected as the standard meridian of India?
- 2 When it’s 12 noon at Greenwich What is the local time at Allahabad 82 1/2 e?
- 3 Why is there a gap of 2 hours between Gujarat and Arunachal Pradesh in the sun rising?
- 4 Which longitude is treated as the standard meridian?
Why is 82 degrees 30 minutes East is selected as the standard meridian of India?
Why 82° 30′ E has been selected as the Standard Meridian of India? Answer: 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.
What is the importance of 82 1/2 E longitude?
The most important longitude of our country India is 82 ½ degree because it is the Indian Standard Meridian which passes through Allahabad and Chennai. It is very important because the time in India is determined ONLY by this particular meridian.
What is the reason for choosing the standard meridian in the coefficient of 7 degree 30 longitude?
Why is standard meridian taken in multiples of 7°30′? – Quora. The rotation of the earth of 360 deg is covered in 24 hours. 1 hour represents 360/24 = 15 deg. So every 30 minute is equivalent 7.5 deg or 7 deg and 30 min.
When it’s 12 noon at Greenwich What is the local time at Allahabad 82 1/2 e?
Answer: 12- 2=10am.
Why do we need a standard time for our country?
The time of a place depends on the longitude that passes through it. Since many meridians pass through it, it is important to adopt the local time of one central meridian of a country as the standard time for the country. Thus, we need a standard meridian for the country.
Why do we need standard meridian for India explain?
We need a standard meridian for India because there is a time lag of about 2 hours between Gujarat and Arunachal Pradesh. To avoid confusion of time in different states , India adopted a standard meridian which is 82 degrees 30 E and it passes through Mirzapur in Uttar Pradesh.
Why is there a gap of 2 hours between Gujarat and Arunachal Pradesh in the sun rising?
There is a time lag of two hours from Gujarat to Arunachal Pradesh because of the longitudinal extent of India. Gujarat is situated in the extreme west of India Arunachal Pradesh is situated in the extreme east of India. The Sun rises two hours earlier in Arunachal Pradesh than Gujarat.
What is the actual time for the 82°E longitude?
Thus the actual time for the 82.5°E longitude is at a difference of 5 and half hours i.e. 5 hrs and 30 min from the Greenwich mean time (0° longitude). and this longitude passes nearly through the middle of India whereas 75°E (5 hours) and 90°E (6 hours) longitudes pass through extreme western and extreme eastern parts of the country.
What is the relationship between longitude and time?
Longitude and Time Since the earth makes one complete revolution of 360° in one day or 24 hours, it passes through 15° in one hour or 1° in 4 minutes. The earth rotates from west to east, so every 15° we go eastwards, local time is advanced by 1 hour. Conversely, if we go westwards, local time is retarded by 1 hour.
Which longitude is treated as the standard meridian?
In India, the longitude of 82½° E (82° 30’E) is treated as the standard meridian. The local time at this meridian is taken as the standard time for the whole country.
Why 82 30 E has been selected as the standard meridian?
Ans- 82⁰30’E has been selected as the standard meridian of India because of the following reasons:- (a) It passes through the middle of the country. (b) In every time zone the local time of middle longitude (divisible by 7⁰ 30′ ) is adapted as the standard meridian.