Question

Define IST and prime meridians ​

Answer 1

Answer:

A prime meridian is a meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. ... If one uses directions of East and West from adefined prime meridian, then they can be called the Eastern Hemisphere and the Western Hemisphere.

Answer 2

Answer:

INDIAN STANDARD TIME (IST)

Indian Standard Time is calculated on the basis of 82.5' E longitude, in Mirzapur (Amravati Chauraha), Uttar Pradesh, which is nearly on the corresponding longitude reference line.

Indian Standard Time (IST) is the time observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time (DST) or other seasonal adjustments.

PRIME MERIDIAN

A prime meridian is a meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid, e.g., Earth, into two hemispheres. If one uses directions of East and West from a defined prime meridian, then they can be called the Eastern Hemisphere and the Western Hemisphere.

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