Which of the following demonstrates the result of waves traveling at
different speeds when moving from one medium to another?

A. The absence of any sound in outer space

B. The bending of light as it moves from air to water

C. The movement of ocean currents as the earth rotates

D. The up and down motion of a collided metal spring

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b.what is the wavelength of the wave? c.what is the amplitude of the magnetic field? d.what is the intensity of the wave?

Is the number of complete movements of a wave per second.