6) The big string of a guitar plays a low E note. The guitar vibrates at a frequency of 41.2 Hz. The sound
wave moves at s41 m/e
at 343 m/s. What is the wavelength of the sound wave?

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3