Ashort current element dl⃗ = (0.500 mm)j^ carries a current of 5.40 a in the same direction as dl⃗ . point p is located at r⃗ = ( -0.730 m)i^+ (0.390m)k^. part a find the magnetic field at p produced by this current element. enter the x, y, and z components of the magnetic field separated by commas.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.