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Explain geographic meridian and magnetic...

Explain geographic meridian and magnetic meridian.

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(i) Geographic meridian : Consider a point on the Earth.s surface. At such a point, the direction of the longitude circle determines the geographic north-south direction, the line of longitude towards the north pole being the direction of true north.
Definition : The vertical plane containing the longitude circle and the axis of rotation of Earth is called the geographic meridian.
(ii) Magnetic meridian (Definition) : The vertical plane at a place on the Earth passes through the imaginary line joining the magnetic north and the south pole is called magnetic meridian.
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Knowledge Check

  • At any place on the earth, the angle between the magnetic meridian and the geographic meridian is called ....

    A
    magnetic dip angle
    B
    magnetic latitude
    C
    magnetic declination
    D
    magnetic declination

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