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.
Best Answer: speed/wavelength=frequency frequency/speed=wavelength if you have either the wavelength or the frequency you can find out the other variables. If you are talking about electromagnetic waves, speed is constant, it is 2.99x10^8 m/s, so you will always be looking for wavelength or frequency.