Explain ‘Declination of Magnetic needle’ and types of declination.
Ans:
The magnetic meridian at a place does not coincide with the true meridian at that place.
The horizontal angle made by the magnetic meridian with the true meridian is called ‘magnetic declination’.
The magnetic meridian varies from place to place and also from time to time on the surface of the earth and hence, the declination is also different at different places.
Types of declination:-
In some cases the magnetic meridian is deflected to the East side of the true meridian called as ‘East declination’ while in others it points to the west of the true meridian called as ‘West declination’