Energy and Frequency. Planck showed how the energy of a quantum of light is related is related to its frequency. He defined a constant, known as Planckâs constant, which, when multiplied by the frequency of a light quantum, gives its energy.
curiosity noun (INTEREST). B2 [U] an âeager âwish to âknow or âlearn about something: to âarouse/âexcite/âsatisfy someone's curiosity I'm âburning with curiosity-you must âtell me who âwon! She âdecided to âcall her ex-boyfriend out of curiosity.
curious. adjective. 1  Eager to learn more: curious investigators; a trapdoor that made me curious. 2  Unduly inquisitive; prying: a curious neighbor always looking over the fence. 3  Arousing interest because of novelty or strangeness: a curious fact.