Tangential Components of Electrical Fields Equal at Dialectrics Interface

[coffeem]

Homework Statement

show that the tangential components of electrical fields above and below the interface of two dialectrical media are equal

Homework Equations

The Attempt at a Solution

hi this is a part of a question from a past exam which i am trying to do. it is only worth one mark so i am assuming its not hard. any ideas to get me started because I am stumped. thanks

 

[Hootenanny]

HINT: You need to use one of Maxwell's equations.