The poles of earth s magnetic field can never switch places. select the best answer from the choices provided
a. true
b. false

False

Explanation:

False

The magnetic field of the earth can switch places, something that has happened before in the history of the earth.

Due to the nature of this phenomenon and because it is not known exactly why it happens, it is very difficult to predict when it is going to happen, but it is estimated that the last inversion of the Earth's magnetic field occurred 780,000 years ago.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.