Unlike particles in a liquid or a gas, the particles in a typical solid are arranged A. separately from one another in constantly changing positions
B. in close contact with one another and in constantly changing positions
C. randomly in fixed positions
D. in orderly patterns and fixed positions

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.