Stars A and B have the same absolute brightness and are the same temperature, but when you look in the sky, Star A looks dimmer. Why is this?
Star Ais closer than Star
B
Star A is farther away than Stars
с
Stars A and B are the same distance
None of the above

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.