Question

4. The E vs k relationship for a free electron is a parabola.

 A. True

 B. False

Answer 1

The parabola is a ma thematic figure that is created by a cone intersecting with a parallel plane and the free electrons of any object in stationary position have two main characteristics, namely the energy E and vector k.

This energy can be kinetic or potential, which is largely dependent on the vector and this mutual relationship of E and k is termed as dispersion relation and can be depicted by the diagram of a parabola.