8 pts for this: This is shown as a two part question

Calculate the energy and frequency of the radiation with a wavelength of 500 nm.

what is the wavelength change of a radio signal changes if the admitting source is moving away at 3,000 km/s. The lab (rest) wavelength of this radio signal is 1 meter.​

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