Consider a thin permanently interface of magnetic medium of permeability μ and vacuum. If the magnetic medium near a point on the interface makes an angle the interface. The angle 6, made by the magnetic field with the normal is, with the normal to (a) ₁ = tan (b) tan Мо tan e μ (c) 6 Мо = cose μ μ (d) 6₁ = -tan e Мо