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.
For instance, when light passes from a less dense medium, such as air, to a more dense medium, such as water, the speed at which the electromagnetic wave is traveling decreases. Alternatively, when light passes from a more dense medium to a less dense medium, the speed of the wave increases.