Consider an interface between two dielectric materials, one with ε_r = 2 while the other has ε_r = 5. If the tangential component of electric field on one side of the interface has a magnitude of 10 V.m^-1. What is the magnitude of the tangential component of electric field on the other side?

A. 10 V.m^-1

B. 20 V.m^-1

C. 2 V.m^-1

D. 5 V.m^-1

Answer: Option A