Question

Q.17. What is a geographic meridian? How does the declination vary with latitude?

Answer 1

Answer:

Magnetic declination varies with both latitude and longitude because the magnetic poles are not coincident with true North and South, so the angle between Magnetic North and true North will vary except along the great circle that goes through both, that is the longitude for which a compass points directly at both

Answer 2

Answer:-

Half of the Earth surface’s imaginary great circle is called the Geographic meridian, which is the longitude line.

Explanation:

• This is terminated by the South Pole, North Pole and the equal longitude’s connecting points.

• This is measured as east or west in angular degrees of the Prime Meridian.

• With both the longitude and latitude, the magnetic declination varies. This is due to the reason that the magnetic poles are not equivalent with true South and North.

• Thus, the angle between the true North and Magnetic North will differ expect the circle going via both.