Classical wave theory and quantum physics make different predictions about the effect of incident electromagnetic radiation on a photoelectric surface. Four Photoelectric Effect Predictions 1. The energy of the emitted photoelectrons will increase if the intensity of the incident electromagnetic radiation is increased. 2. The energy of the emitted photoelectrons is independent of the intensity of the incident electromagnetic radiation. 3. Low-intensity electromagnetic radiation incident on a photoelectric surface for long periods of time will cause photoemission. 4. High-intensity electromagnetic radiation will not cause photoemission unless its frequency is greater than the photoelectric surface's threshold frequency. Which predictions related to the classical wave theory? -1 and 4 -2 and 4 -2 and 3 -1 and 3 NEXT QUESTION- Small flashes of blue light are observed when air bubbles in water are exposed to ultrasound. The frequency of the blue light is 7.14 X1014 Hz. The minimum sound energy required to produce one photon of blue light is eV (Record your three digit answer.)