First recognized in 1900 by Max Planck, it was originally the proportionality constant between the minimal increment of energy, E, of a hypothetical electrically charged oscillator in a cavity that contained black body radiation, and the frequency, f, of its associated electromagnetic wave. In 1905 the value E, the minimal energy increment of a hypothetical oscillator, was theoretically associated by Einstein with a "quantum" or minimal element of the energy of the electromagnetic wave itself. The light quantum behaved in some respects as an electrically neutral particle, as opposed to an electromagnetic wave. It was eventually called the photon. COUNT 14
QSN1 What is considered the minimal energy increment of a hypothetical oscillator? ANS1 value E QSN2 In what year was the value E associated by Einstein with quantum theories of energy? ANS2 1905 QSN3 Who discovered an association between the value E and quantum energy? ANS3 Einstein QSN4 What did the light quantum behave the same as in laboratory experiments? ANS4 neutral particle QSN5 What type of charge did a particle have that behaved similarly to light quantum energy? ANS5 neutral QSN6 What is energy abbreviated to in science? ANS6 E QSN7 What is frequency also known as in science? ANS7 f QSN8 What term describes a small amount of element? ANS8 quantum QSN9 What did the light quantum, in some ways, behave as? ANS9 an electrically neutral particle QSN10 What was later termed the photon? ANS10 The light quantum QSN11 When did Max Planck first recognize the value of the Planck constant? ANS11 1900 QSN12 Which scientist associated the Planck constant with a quantum five years after Planck's recognition? ANS12 Einstein QSN13 Instead of an electromagnetic wave, what did the light quantum behave as in some regards? ANS13 an electrically neutral particle QSN14 What is the simple name given to the light quantum today? ANS14 the photon