1. a word or phrase supposed to have magic power; incantation. 2. a state or period of enchantment: living under a spell. 3. any dominating or irresistible influence; fascination: the spell of fine music.
IF a wave moving at a constant speed were to have it's wavelength doubled (Wavelength x 2), then the frequency of the wave would be half of what it originally was (Frequency / â¦ 2). 6 people found this useful. Al Cohen.
As you go from one medium to another, the frequency stays the same, but the wavelength changes. The speed of the wave traveling from one medium to another changes, and that change is proportional to the change in wavelength. As you go from one medium to another, the refractive index, n, for that medium changes.