Lternating quarter-wave layers of refractive indices 1.6 and 1.7 are used to reduce the reflectivity from a substrate ns = 3.5 at 1000 nm light wavelength and normal incidence in air. determine the number of pairs (integer) and the order of the layers that will result in the minimum reflectivity. what is the minimum reflectivity?

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop