Which of the following best describes what displacement is? o displacement is a vector, it must have magnitude only
o displacement is a scalar, it must have magnitude and direction
o displacement is a scalar, it must have magnitude only
o displacement is a vector, it must have magnitude and direction

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