A). a physical change cannot be reversed. b). a physical change causes new material c). you can reverse a physical change d). a change in state is not a physical change ask for details follow report by wwehardyboy123

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.