Quantum physics study guide Questions with Correct Answers.

There have been two models of light. What are they and who first supported each? Correct Answer Particle: Newton and wave: Huygens (1600s) What determines the color with which a body glows? Correct Answer temperature What is Planck's equation? Correct Answer E=hf What does Planck's equation mean? Correct Answer Energy comes in discrete packets. Energy of a photon is proportional to its frequency. What does Planck's equation explain? Correct Answer Blackbody radiation problem and the photoelectric effect What is Planck's constant (both what does it mean and what is its value)? Correct Answer 6.63x10-34 Js,(very small) it is the proportionality constant relating a photon's energy and frequency. What is a quantum? Correct Answer Small packet (of energy) What is a photon? Correct Answer Quantum of light or particle of light What is the photoelectric effect? Correct Answer Emission of electrons from a metal when struck by certain frequencies of light. Why can't low frequency light cause the emission of electrons, regardless of the intensity of the light? Correct Answer The energy per photon is too low to get electrons