#3 If the wavelength of an EM wave is 600 nanometers, then what is the frequency? Assume the wave is traveling through glass.
#4 Use the link below to summarize how a shadow can move faster than the speed of light.
https://thescienceexplorer.com/universe/4-ways-travel-faster-speed-light
#1 Describe the observation of the photoelectric effect.
#2 How many photons does it take to eject an electron? Explain.
