Roger knows the energy of a wave with an amplitude of 15 cm is 450 w/cm? What would be the energy for a wave that has an amplitude of 30 cm?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.