Answer to Question #178928 in Physics for John withers

Question

When a light wave travels from water into air, its wavelength increases. What will happen to the wave’s frequency and speed? What will happen to the direction of the energy transfer? 

Answer 1

When the light wave travels from water into air its speed increases, but the frequency remains the same. The direction of the energy transfer of the wave (or the propagation direction) is changed (in other words, there is a refraction of the wave at the water-air boundary).