Light deflection by squashed Kaluza-Klein black holes in a plasma medium

We study motions of photons in an unmagnetized cold homogeneous plasma medium the five-dimensional charged static squashed Kaluza-Klein black hole spacetime. In this case, a photon behaves as massive particle four-dimensional spherically symmetric consider light deflection by surrounded weak-field limit. derive corrections angle to general relativity, which are related size extra dimension, charge and ratio between frequencies.