Question

The longitudes are also called ____________.
A. Circles
B. Parallel lines
C. Night lines
D. Mid-day lines

Answer 1

Hint: Longitude is the estimation east or west of the prime meridian. Longitude is estimated by nonexistent lines that go around the Earth vertically (here and there) and meet at the North and South Poles. These lines are known as meridians. The distance around the Earth estimates 360 degrees.

Complete step-by-step solution:
Longitude is a geographic organization that determines the east-west situation of a point on the Earth's surface, or the outside of a divine body. It is a precise estimation, generally communicated in degrees and meant by the Greek letter lambda. Meridians (lines running from shaft to post) interface focuses with a similar longitude. The prime meridian, which passes close to the Royal Observatory, Greenwich, England, is characterized as $0^\circ $ longitudes by the show. Positive longitudes are on the east of the prime meridian, and the negative ones are on the west. Due to the world's pivot, there is a nearby association between longitude and time. Nearby an ideal opportunity (for instance from the situation of the sun) shifts with longitude, a distinction of $15^\circ $ longitude relating to a one-hour contrast in neighborhood time. Contrasting nearby time with a flat out proportion of time permits longitude to be resolved. Contingent upon the period, the supreme time may be acquired from a heavenly occasion obvious from the two areas, for example, a lunar overshadowing, or from a period signal communicated by broadcast or remote. The guideline is clear, however, practically speaking finding a solid strategy for deciding longitude required hundreds of years and required the exertion of the absolute most noteworthy logical personalities. An area's north-south situation along a meridian is given by its scope, which is roughly the point between the neighborhood vertical and the central plane. Longitude is commonly given utilizing the mathematical or galactic vertical. This can vary somewhat from the gravitational vertical due to little varieties in Earth's gravitational field.

Thus, option (D) is correct.

Note: The idea of longitude was first evolved by antiquated Greek space experts. Hipparchus (second century BCE) utilized an organizing framework that expected round earth and separated it into 360° as we do today. His prime meridian went through Alexandria.